A quarantine is a restriction on the movement of people, animals, and goods which is intended to prevent the spread of disease or pests. It is often used in connection to disease and illness, preventing the movement of those who may have been exposed to a infection, yet do not have a confirmed medical diagnosis. It is distinct from medical isolation, in which those confirmed to be infected with a communicable disease are isolated from the healthy population.
The concept of quarantine is known to have been practised through history in various places. Notable quarantines in modern history include the village of Eyam in 1665 during the bubonic plague outbreak in England; American Samoa during the Spanish flu; the Diphtheria outbreak during the 1925 serum run to Nome, the 1972 Yugoslav smallpox outbreak, the SARS pandemic, the Ebola pandemic and extensive quarantines applied throughout the world.
Ethical and practical considerations need to be considered when applying quarantine to people. Practice differs from country to country; in some countries, quarantine is just one of many measures governed by legislation relating to the broader concept of biosecurity; for example, Australian biosecurity is governed by the single overarching Biosecurity Act 2015.
Merriam-Webster gives various meanings to the noun form, including "a period of 40 days", several relating to ships, "a state of enforced isolation", and as "a restriction on the movement of people and goods which is intended to prevent the spread of disease or pests". The word is also used as a verb.
Quarantine is distinct from medical isolation, in which those confirmed to be infected with a communicable disease are isolated from the healthy population. Quarantine and Isolation Centers for Disease Control and Prevention, Quarantine and Isolation, accessed 5 February 2020
Quarantine may be used interchangeably with cordon sanitaire, and although the terms are related, cordon sanitaire refers to the restriction of movement of people into or out of a defined geographic area, such as a community, in order to prevent an infection from spreading.
The word "quarantine" originates from quarantena, the Venetian language form, meaning "forty days". This is due to the 40-day isolation of ships and people practised as a measure of disease prevention related to the plague. Between 1348 and 1359, the Black Death wiped out an estimated 30% of Europe's population, and a significant percentage of Asia's population. Such a disaster led governments to establish measures of containment to handle recurrent epidemics. A document from 1377 states that before entering the city-state of Ragusa in Dalmatia (modern Dubrovnik in Croatia), newcomers had to spend 30 days (a trentine) in a restricted place (originally nearby islands) waiting to see whether the symptoms of Black Death would develop. In 1448 the Venetian Senate prolonged the waiting period to 40 days, thus giving birth to the term "quarantine".The Journal of Sociologic Medicine – Volume 17 The forty-day quarantine proved to be an effective formula for handling outbreaks of the plague. Dubrovnik was the first city in Europe to set up quarantine sites such as the Lazzarettos of Dubrovnik where arriving ship personnel were held for up to 40 days. According to current estimates, the bubonic plague had a 37-day period from infection to death; therefore, the European quarantines would have been highly successful in determining the health of crews from potential trading and supply ships.Susan Scott and Christopher Duncan, Biology of Plagues: Evidence from Historical Populations, Cambridge, United Kingdom: Cambridge University Press, 2001
Other diseases lent themselves to the practice of quarantine before and after the devastation of the plague. Those affected by leprosy were historically isolated long-term from society. Quarantine systems were enacted to prevent the spread of syphilis in Zurich in the 15th and 16th centuries, the advent of yellow fever in Spain at the beginning of the 19th century, and the arrival of Asiatic cholera in 1831.
Venice took the lead in measures to check the spread of plague, having appointed three guardians of public health in the first years of the Black Death (1348). The next record of preventive measures comes from Reggio Emilia/Modena in 1374. Venice founded the first lazaret (on a small island adjoining the city) in 1403. In 1467 Genoa followed the example of Venice, and in 1476 the old leper hospital of Marseille was converted into a plague hospital. The great lazaret of Marseille, perhaps the most complete of its kind, was founded in 1526 on the island of Pomègues. The practise at all the Mediterranean lazarets did not differ from the English procedure in the Levantine and North African trade. On the arrival of cholera in 1831 some new lazarets were set up at western ports; notably, a very extensive establishment near Bordeaux. Afterwards, they were used for other purposes.
People were prevented from entering the Ashanti Empire at border checkpoints if they exhibited symptoms of smallpox. Those who discovered symptoms of the disease after entering Ashanti were quarantined in remote villages. In the 1830s, both the Ottoman Empire and Egypt established new quarantine systems. In 1831, Mehmet Ali of Egypt founded the Quarantine Board in Alexandria. In 1838, the Ottoman government installed the Supreme Council of Health, including the Quarantine Administration, in Istanbul. These two institutions set up permanent quarantines throughout the eastern Mediterranean, based on the western Mediterranean quarantine model. For example, at the port of İzmir, all ships and their cargo would be inspected and those suspected of carrying the plague would be towed to separate docks and their personnel housed in separate buildings for a determined period of time. In Thessaly, along the Greek-Turkish border, all travellers entering and exiting the Ottoman Empire would be quarantined for 9–15 days. Upon appearance of the plague, the quarantine stations would be militarised and the Ottoman army would be involved in border control and disease monitoring.
The Venice convention of 30 January 1892 dealt with cholera by the Suez Canal route; that of Dresden of 15 April 1893, with cholera within European countries; that of Paris of 3 April 1894, with cholera by the pilgrim traffic; and that of Venice, on 19 March 1897, was in connection with the outbreak of plague in the East, and the conference met to settle on an international basis the steps to be taken to prevent, if possible, its spread into Europe. An additional convention was signed in Paris on 3 December 1903. Text of the 1903 convention British Foreign and Commonwealth Office, www.fco.gov.uk , accessed 5 February 2020
A multilateral international sanitary convention was concluded at Paris on 17 January 1912.Text in League of Nations Treaty Series, vol. 4, pp. 282–413. This convention was most comprehensive and was designated to replace all previous conventions on that matter. It was signed by 40 countries, and consisted of 160 articles. Ratifications by 16 of the signatories were exchanged in Paris on 7 October 1920. Another multilateral convention was signed in Paris on 21 June 1926, to replace that of 1912. It was signed by 58 countries worldwide, and consisted of 172 articles.Text in League of Nations Treaty Series, vol. 78, pp. 230–349.
In Latin America, a series of regional sanitary conventions were concluded. Such a convention was concluded in Rio de Janeiro on 12 June 1904. A sanitary convention between the governments of Argentina, Brazil, Paraguay, and Uruguay was concluded in Montevideo on 21 April 1914.Text in League of Nations Treaty Series, vol. 5, pp. 394–441. The convention covers cases of Asiatic cholera, oriental plague and yellow fever. It was ratified by the Uruguayan government on 13 October 1914, by the Paraguayan government on 27 September 1917 and by the Brazilian government on 18 January 1921.
Sanitary conventions were also concluded between European states. A Soviet-Latvian sanitary convention was signed on 24 June 1922, for which ratifications were exchanged on 18 October 1923.Text in League of Nations Treaty Series, vol. 38, pp. 10–55. A bilateral sanitary convention was concluded between the governments of Latvia and Poland on 7 July 1922, for which ratifications were exchanged on 7 April 1925.Text in League of Nations Treaty Series, vol. 37, pp. 318–339. Another was concluded between the governments of Germany and Poland in Dresden on 18 December 1922, and entered into effect on 15 February 1923.Text in League of Nations Treaty Series, vo. 34, pp. 302–313. Another one was signed between the governments of Poland and Romania on 20 December 1922. Ratifications were exchanged on 11 July 1923.Text in League of Nations Treaty Series, vol. 18, pp. 104–119. The Polish government also concluded such a convention with the Soviet government on 7 February 1923, for which ratifications were exchanged on 8 January 1924.Text in League of Nations Treaty Series, vol. 49, pp. 286–314. A sanitary convention was also concluded between the governments of Poland and Czechoslovakia on 5 September 1925, for which ratifications were exchanged on 22 October 1926.Text in League of Nations Treaty Series, vol. 58, pp. 144–177. A convention was signed between the governments of Germany and Latvia on 9 July 1926, for which ratifications were exchanged on 6 July 1927.Text in League of Nations Treaty Series, vol. 63, pp. 322–361.
In 1897, the incubation period for this disease was determined and this was to be adopted for administrative purposes. The incubation period was comparatively short, some three or four days. After much discussion ten days was accepted by a majority. The principle of disease notification was unanimously adopted. Each government had to notify other governments of the existence of plague within their jurisdictions and state the measures of prevention being carried out to prevent its spread. The area declared infected was limited to the district or village where the disease prevailed, and no locality was deemed to be infected because of the importation into it of a few cases of plague while there has been no spread. It was decided during the prevalence of plague, every country had the right to close its land borders to traffic. At the Red Sea, it was decided after discussion a healthy vessel could pass through the Suez Canal and continue its voyage in the Mediterranean during the incubation period of the disease and that vessels passing through the Canal in quarantine might, subject to the use of the electric light, coal up in quarantine at Port Said by night or by day, and that passengers might embark in quarantine at that port. Infected vessels, if these carry a doctor and a disinfecting stove, have a right to navigate the Canal in quarantine and subject only to the landing of those who have plague.
In the 20th and 21st centuries, people suspected of carrying infectious diseases have been quarantined, as in the cases of Andrew Speaker (multi-drug-resistant tuberculosis, 2007) and Kaci Hickox (Ebola, 2014). During the 1957–58 influenza pandemic and the 1968 flu pandemic, several countries implemented measures to control spread of the disease. In addition, the World Health Organization applied a global influenza surveillance network.
During the 1994 plague in India, many people were quarantined. Vessels and aircraft carrying passengers were fumigated. Review: Surat Plague of 1994 Re-examined archived from www.tm.mahidol.ac.th, accessed 22 November 2020 The Surat Plague and its Aftermath www.montana.edu, accessed 22 November 2020
In the SARS epidemic, thousands of Chinese people were quarantined and checkpoints to take temperatures were set up.Yanzong Huang, "The SARS Epidemic and its Aftermath in China: A Political Persecutive", Learning from SARS: Preparing for the Next Disease Outbreak: Workshop Summary, Washington (DC): National Academies Press (US), 2004.
Moving infected patients to and home-based self-quarantine of people potentially exposed was the main way the Western African Ebola virus epidemic was ended in 2016; members of the 8th WHO Emergency Committee criticised international travel restrictions imposed during the epidemic as ineffective due to difficulty of enforcement, and counterproductive as they slowed down aid efforts.
The People's Republic of China has employed mass quarantines – firstly of the city of Wuhan and subsequently of all of the Hubei province (population 55.5 million) – in the coronavirus disease 2019 pandemic. After a few weeks, the Italian government imposed lockdowns for the entire country (more than 60 million people) in an attempt to stop the spread of the disease there. India quarantined itself from the world for a period of one month. Most governments around the world restricted or advised against all non-essential travel to and from countries and areas affected by the outbreak. By late 2020, the virus had already spread within communities in large parts of the world, with many not knowing where or how they were infected.
Ships in quarantine today would fly either the Q flag alone, meaning "My vessel is 'healthy' and I request free pratique", or the double Q flag (QQ), meaning "I require health clearance". International Code of Signals, page 102. msi.nga.mil
In addition, when quarantine is imposed, public health ethics specify that:
Finally, the state is ethically obligated to guarantee that:
The February–March 2003 issue of HazMat Magazine suggests that people be "locked in a room until proper decon could be performed", in the event of "suspect anthrax".
Standard-Times senior correspondent Steve Urbon (14 February 2003) describes such temporary quarantine powers:
The purpose of such quarantine-for-decontamination is to prevent the spread of contamination and to contain the contamination such that others are not put at risk from a person fleeing a scene where contamination is suspect. It can also be used to limit exposure, as well as eliminate a vector.
New developments for quarantine include new concepts in quarantine vehicles such as the ambulance bus, mobile hospitals, and lockdown/invacuation (inverse evacuation) procedures, as well as docking stations for an ambulance bus to dock to a facility under lockdown.
Australia has very strict quarantine standards. Quarantine in northern Australia is especially important because of its proximity to South-East Asia and the Pacific, which have many pests and diseases not present in Australia. For this reason, the region from Cairns to Broome—including the Torres Strait—is the focus for quarantine activities that protect all Australians. As Australia has been geographically isolated from other major continents for millions of years, there is an endemically unique ecosystem free of several severe pests and diseases that are present in many parts of the world. If other products are brought inside along with pests and diseases, it would damage the ecosystem seriously and add millions of costs in the local agricultural businesses.
Under the Quarantine Act, all travellers must submit to screening and if they believe they might have come into contact with communicable diseases or vectors, they must disclose their whereabouts to a Border Services Officer. If the officer has reasonable grounds to believe that the traveller is or might have been infected with a communicable disease or refused to provide answers, a quarantine officer (QO) must be called and the person is to be isolated. If a person refuses to be isolated, any peace officer may arrest without warrant.
A QO who has reasonable grounds to believe that the traveller has or might have a communicable disease or is infested with vectors, after the medical examination of a traveller, can order him/her into treatment or measures to prevent the person from spreading the disease. QO can detain any traveller who refuses to comply with his/her orders or undergo health assessments as required by law.
Under the Health of Animals Act and Plant Protection Act, inspectors can prohibit access to an infected area, dispose or treat any infected or suspected to be infected animals or plants. The Minister can order for compensation to be given if animals/plants were destroyed pursuant to these acts.
Each province also enacts its own quarantine/environmental health legislation.
The law allows for health officers who have reasonable grounds to detain, isolate, quarantine anyone or anything believed to be infected, and to restrict any articles from leaving a designated quarantine area. He/she may also order the Civil Aviation Department to prohibit the landing or leaving, embarking or disembarking of an aircraft. This power also extends to land, sea or air crossings.
Under the same ordinance, any police officer, health officer, member of the Civil Aid Service, or member of the Auxiliary Medical Service can arrest a person who obstructs or escapes from detention.
After the passing of the Quarantine Act 1710 the protective practices in England were haphazard and arbitrary. In 1721 two vessels carrying cotton goods from Cyprus, then affected by the plague, were ordered to be burned with their cargoes, the owners receiving an indemnity. By the clause in the Levant Trade Act 1752, ships arriving in the United Kingdom with a "foul bill" (i.e. coming from a country where plague existed) had to return to the of Malta, Venice, Messina, Livorno, Genoa, or Marseille, to complete a quarantine or to have their cargoes opened and aired. Since 1741 Stangate Creek (on the Medway) had been the quarantine station but it was available only for vessels with clean bills of health. In 1755 lazarets in the form of floating hulks were established in England for the first time, the cleansing of cargo (particularly by exposure to ) having been done previously on the ship's deck. No medical inspections were conducted, but control was the responsibility of the Officers of Customs and quarantine. In 1780, when plague was in Poland, even vessels with grain from the Baltic region had to spend forty days in quarantine, and unpack and air their cargoes, but due to complaints mainly from Edinburgh and Leith, an exception was made for grain after that date. About 1788 an order of the council required every ship liable to quarantine to hoist a yellow flag in the daytime and show a light at the main topmast head at night, in case of meeting any vessel at sea, or upon arriving within four leagues of the coast of Great Britain or Ireland, the Channel Islands, or the Isle of Man.
After 1800, ships from plague-affected countries (or with foul bills) were permitted to complete their quarantine in the Medway instead of at a Mediterranean port on the way, and an extensive lazaret was built on Chetney Hill near Chatham (although it was later demolished). The use of floating hulks as lazarets continued as before. In 1800 two ships with hides from Mogador in Morocco were ordered to be sunk with their cargoes at the Nore, the owners receiving an indemnity. Animal hides were suspected of harbouring infections, along with a long list of other items, and these had to be exposed on the ship's deck for twenty-one days or less (six days for each instalment of the cargo), and then transported to the lazaret, where they were opened and aired for another forty days. The whole detention of the vessel was from sixty to sixty-five days, including the time for reshipment of her cargo. Pilots had to pass fifteen days on board a convalescent ship. From 1846 onwards the quarantine establishments in the United Kingdom were gradually reduced, while the last vestige of the British quarantine law was removed by the Public Health Act 1896, which repealed the Quarantine Act 1825 (with dependent clauses of other acts), and transferred from the privy council to the Local Government Board the powers to deal with ships arriving infected with yellow fever or plague. The powers to deal with cholera ships had been already transferred by the Public Health Act 1875.
British regulations of 9 November 1896 applied to yellow fever, Bubonic plague and cholera. Officers of Her Majesty's Customs, as well as of Her Majesty's Coastguard and the Board of Trade (for signalling), were empowered to take the initial steps. They certified in writing the master of a supposedly infected ship, and detained the vessel provisionally for not more than twelve hours, giving notice meanwhile to the Port authority. The medical officer of the port boarded the ship and examined every person in it. Every person found infected was taken to a hospital and quarantined under the orders of the medical officer, and the vessel remained under his orders. Every person suspected could be detained on board for 48 hours or removed to the hospital for a similar period. All others were free to land upon giving the addresses of their destinations to be sent to the respective local authorities, so that the dispersed passengers and crew could be kept individually under observation for a few days. The ship was then disinfected, dead bodies buried at sea, infected clothing, bedding, etc., destroyed or disinfected, and bilge-water and Sailing ballast pumped out at a suitable distance before the ship entered a dock or basin. Mail was subject to no detention. A stricken ship within 3 miles of the shore had to fly a yellow and black flag at the main mast from sunrise to sunset.
The Department of Health and Human Services is responsible for quarantine decisions, specifically the Centers for Disease Control and Prevention's Division of Global Migration and Quarantine. As of 21 March 2017, Centers for Disease Control and Prevention (CDC) regulations specify: Specific Laws and Regulations Governing the Control of Communicable Diseases – Final Rule for Control of Communicable Diseases: Interstate and Foreign www.cdc.gov, accessed 4 March 2020
The rules:
Besides the port of entry where it is located, each station is also responsible for quarantining potentially infected travellers entering through any ports of entry in its assigned region. These facilities are fairly small; each one is operated by a few staff members and capable of accommodating 1–2 travellers for a short observation period. Cost estimates for setting up a temporary larger facility, capable of accommodating 100 to 200 travellers for several weeks, have been published by the Airport Cooperative Research Program (ACRP) in 2008 of the Transportation Research Board.
In early June 1832, during the cholera epidemic in New York, Governor Enos Throop called a special session of the Legislature for 21 June, to pass a Public Health Act by both Houses of the State Legislature. It included to a strict quarantine along the Upper and Lower New York-Canadian frontier. In addition, New York City Mayor Walter Browne established a quarantine against all peoples and products of Europe and Asia, which prohibited ships from approaching closer than 300 yards to the city, and all vehicles were ordered to stop 1.5 miles away.
The Immigrant Inspection Station on Ellis Island, built in 1892, is often mistakenly assumed to have been a quarantine station, however its marine hospital (Ellis Island Immigrant Hospital) only qualified as a contagious disease facility to handle less virulent diseases like measles, trachoma and less advanced stages of tuberculosis and diphtheria; those affected by smallpox, yellow fever, cholera, leprosy or typhoid fever, could neither be received nor treated there.
Mary Mallon was quarantined in 1907 under the Greater New York Charter, Sections 1169–1170,Judith Walzer Leavitt, Typhoid Mary: Captive to the Public's Health, Beacon Press, 1996, p. 71. which permitted the New York City Board of Health to "remove to a proper place...any person sick with any contagious, pestilential or infectious disease." The Greater New York Charter as enacted in 1897 www.columbia.edu, accessed 2 February 2020
During the 1918 flu pandemic, people were also quarantined. Most commonly suspect cases of infectious diseases are requested to voluntarily quarantine themselves, and Federal and local quarantine statutes only have been uncommonly invoked since then, including for a suspected smallpox case in 1963.
The 1944 Public Health Service Act "to apprehend, detain, and examine certain infected persons who are peculiarly likely to cause the interstate spread of disease" clearly established the federal government's quarantine authority for the first time. It gave the United States Public Health Service responsibility for preventing the introduction, transmission and spread of communicable diseases from foreign countries into the United States, and expanded quarantine authority to include incoming aircraft. The act states that "...any individual reasonably believed to be infected with a communicable disease in a qualifying stage and...if found to be infected, may be detained for such time and in such manner as may be reasonably necessary."
No federal quarantine orders were issued from 1963 until 2020, as American citizens were evacuated from China during the COVID-19 pandemic. U.S. evacuees 'relieved' about quarantine on military base 1 February 2020, AMY TAXIN abcnews.go.com, accessed 6 February 2020
On 26 March 2020, 1.7 billion people worldwide were under some form of lockdown, which increased to 2.6 billion people two days later—around a third of the World population.
On 8 March 2020, a much wider region of Northern Italy was placed under quarantine restrictions, involving around 16 million people. Coronavirus: Authorities order the lockdown of northern Italy to try to halt the virus 8 March 2020 www.bbc.co.uk/programmes (BBC World Service), accessed 10 March 2020 On the next day, the quarantine was extended to the whole of Italy, effective on 10 March 2020, placing roughly 60 million people under quarantine. Coronavirus: Italy extends emergency measures nationwide 10 March 2020 www.bbc.co.uk/news, accessed 10 March 2020
A team of Chinese experts, together with some 31 tonnes of supplies, arrived in Rome on 13 March 2020 to help Italy fight the virus. China sends medical supplies, experts to help Italy battle coronavirus 13 March 2020 www.reuters.com accessed 16 May 2020
On 22 March 2020, Russia sent nine Ilyushin 76 planes with expert virologists, epidemiologists, medical equipment, and pharmaceuticals in a humanitarian aid operation that Italian media dubbed "From Russia With Love". Dalla Russia con amore, Putin invia gli aiuti in Italia. Con un mistero... (From Russia with love, Putin sends aid to Italy. With a mystery ...) Emanuele Rossi, formiche.net, accessed 23 April 2020 For Help On Coronavirus, Italy Turns To China, Russia And Cuba 25 March 2020 www.npr.org, accessed 23 April 2020
Eventually the lockdown was extended until 3 May, although starting from 14 April stationery shops, bookshops, and children clothing's shops were allowed to open.
On 26 April 2020, the so-called "Phase 2" was announced, to start from 4 May. Movements across regions were still forbidden, while movements between municipalities were allowed only to visit relatives or for work and health reasons. Coronavirus, Fase 2: dal 4 maggio sì a incontri con familiari. Il 18 riapriranno i negozi, il primo giugno bar, ristoranti, parrucchieri e centri estetici, 26 April 2020 la Repubblica, accessed 16 May 2020 Moreover, closed factories could re-open, but schools, bars, restaurants, and barbers were still closed. Coronavirus, il nuovo decreto del 26 aprile: ecco il calendario di quello che si potrà fare nella "fase 2", 27 April 2020 Corriere Della Sera, accessed 16 May 2020
As at 4 May 2020, when new cases were running around 0.5%, ( persons) per day and consistently falling, it was expected that museums and retailers might reopen from 18 May, while hairdressers, bars and restaurants were expected to reopen fully on 1 June. Anger as Italy slowly emerges from long Covid-19 lockdown 4 May 2020, www.theguardian.com, accessed 16 May 2020
Regional lockdowns were subsequently imposed as further waves of the virus spread through the country.
As of 18 March 2020, more than 250 million people were in lockdown across Europe.
, more than 280 million people, or about 86% of the population, were under some form of lockdown in the United States, 59 million people were in lockdown in South Africa, and 1.3 billion people were in lockdown in India.
In computer science, "quarantining" describes putting files infected by into a special directory, so as to eliminate the threat they pose, without irreversibly deleting them.
The Spanish term for quarantine, (la) cuarentena, refers also to the period of postpartum confinement in which a new mother and her baby are sheltered from the outside world.
United States
Federal rules
US quarantine facilities
US quarantine of imported goods
History of quarantine laws in the US
List of quarantine services in the world
Notable quarantines
Eyam village, 1665 (plague)
Convict ship Surry, Sydney Harbour, 1814 (typhoid)
'Typhoid Mary' (US), 1907–1910 and 1915–1938
East Samoa, 1918 (flu pandemic)
Gruinard Island, 1942–1990 (anthrax)
Apollo series space explorers, 1969–1971
Yugoslavia, 1972 (smallpox)
Case of Kaci Hickox' return to US, 2014 (Ebola)
COVID-19 pandemic, 2020–2023
Hubei
Italy
Rest of Europe
Rest of the world
Self-quarantine
Other uses
See also
Notes
Sources
Further reading
External links
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