There have been at least 931 cases of mumps in American immigration facilities, which officials say present “a perfect storm” for the spread of disease.

The outbreaks at US Customs and Border Protection (CBP) and Immigration and Customs Enforcement (ICE) facilities were detailed in a new report by the Centres for Disease Control and Prevention, which indicated the outbreak has affected both detainees and staff.

It is the latest report to indicate poor conditions in the facilities, after a June report by the Department of Homeland Security’s inspector general found horrible conditions at the centres, with immigrants packed in standing room-only areas with limited access to baths.

“These detention centres are a perfect storm for mumps to spread. Individuals have to be within three to six feet of each other to spread this virus. Sneezing, coughing on someone, or sharing a drink can spread the virus,” Dr Todd Ellerin, the director of infectious diseases and vice chair of medicine at Southshore Health in Massachusetts, told ABC News.

But it is unclear how the situation may be turned around, with CBP officials saying that they do not believe immunisation is appropriate for detainees since the facilities are designed for short stays.

An immigrant's tale: Leaving Britain to escape Brexit hostility Show all 20 1 /20 An immigrant's tale: Leaving Britain to escape Brexit hostility An immigrant's tale: Leaving Britain to escape Brexit hostility Maria, 31, holds her daughters, Elena, two, and baby Ioana, weeks old, in her London home A few months after Britain voted to leave the European Union, Maria was told her to go back to her native Romania whilst in hospital by an elderly English woman. “You are a foreigner, your place is not here” recalls Maria, who was stunned Reuters An immigrant's tale: Leaving Britain to escape Brexit hostility Maria and her husband Adi, 37, take their daughters for a walk in Hampstead Heath near their home The couple are preparing to leave Britain later this year with their two children, fed up with what Maria says is xenophobia and the rising cost of living in London Reuters An immigrant's tale: Leaving Britain to escape Brexit hostility Elena holds up British passports belonging to her and her sister. Both children have dual citizenship, but their parents do not want to apply for this despite having permanent residency in Britain Reuters An immigrant's tale: Leaving Britain to escape Brexit hostility Maria holds daughter Ioana, who is less than a week old, while Elena wipes a table Maria had never faced direct abuse over her nationality in her 10 years in the country until that moment at the hospital Reuters An immigrant's tale: Leaving Britain to escape Brexit hostility Adi spends time with his daughters Reuters An immigrant's tale: Leaving Britain to escape Brexit hostility Adi plays hide and seek with his daughter Elena Reuters An immigrant's tale: Leaving Britain to escape Brexit hostility Food is served Reuters An immigrant's tale: Leaving Britain to escape Brexit hostility Adi takes his daughter, Elena, to nursery Reuters An immigrant's tale: Leaving Britain to escape Brexit hostility Adi's sister, Nicoleta, 34, carries her niece Elena in a restaurant after a trip out Reuters An immigrant's tale: Leaving Britain to escape Brexit hostility Adi and Maria cook together at their home Reuters An immigrant's tale: Leaving Britain to escape Brexit hostility Adi holds his baby daughter, Ioana Reuters An immigrant's tale: Leaving Britain to escape Brexit hostility Adi and wife Maria take their daughters for a walk in Hampstead Heath Reuters An immigrant's tale: Leaving Britain to escape Brexit hostility Berwyn, a neighbour of the couple, who moved to the UK in the 1980s from Australia, says goodbye to Maria after a visit at her home. Berwyn has dual citizenship - Australian and Irish as she lived in Ireland for a few years before moving to Britain. She calls the family her 'dearest Christian Romanian friends' Reuters An immigrant's tale: Leaving Britain to escape Brexit hostility Religious pictures including a portrait of Arsenie Boca, a Romanian Orthodox monk, theologian and artist (top), hang on the wall at the home of Adi and Maria Reuters An immigrant's tale: Leaving Britain to escape Brexit hostility Maria dries Elena after giving her a bath after nursery Reuters An immigrant's tale: Leaving Britain to escape Brexit hostility Maria holds her baby daughter Ioana Reuters An immigrant's tale: Leaving Britain to escape Brexit hostility Adi works with his colleague Alexandru, who is also from Romania, for a removal company Reuters An immigrant's tale: Leaving Britain to escape Brexit hostility Maria holds her daughter Elena Reuters An immigrant's tale: Leaving Britain to escape Brexit hostility Neighbour, Berwyn, holds baby Ioana Reuters An immigrant's tale: Leaving Britain to escape Brexit hostility Adi and Maria, along with their daughters, leave St Andrews church in Kingsbury after attending a service Reuters

Immunisations, according to the CDC, are the most effective way of preventing mumps.

“In general, due to the short-term nature of CBP holding and the complexities of operating vaccination programmes, neither CBP nor its medical contractors administer vaccinations to those in custody,” a spokesperson said in a statement.

ICE, a spokesperson said, will administer flu vaccines, alongside other vaccines, when requested.

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Mumps is a viral infection that causes headache, fever, muscle aches, and swollen cheeks, according to Mayo Clinic. The symptoms can cause pain while chewing or swallowing, and around 80 to 90 per cent of individuals who are not immunised.

In the first half of this year, the CDC says there were around 1,799 cases of mumps across 45 states in the US, plus the District of Columbia.