About 5,200 people have been quarantined after exposure to mumps and chicken pox in Immigration and Customs Enforcement (ICE) detention centers, according to CNN.

About 4,200 detainees have been quarantined for exposure to mumps, 800 to chicken pox, and 100 to both, CNN reports. The quarantine stretches across many of the 39 immigrant detention centers, where many await their deportation hearings.

“Our detention facilities work with local health departments and make sure they’re complying with state health code and make sure that their local health department is aware of the existence of mumps in the facilities,” an ICE official told CNN.

“I think there is heightened interest in this situation because it’s the mumps, which is a new occurrence in custody,” said Nathalie Asher, ICE executive associate director for enforcement and removal operations. “Preventing the spread of communicable disease in ICE custody is something we have demonstrated success doing.”

She continued:

From an operational perspective, the impact is significant in the short and long term and will result in an increase in cohorted detainees’ length of stay in detention, an inability to effect removal of eligible cohorted detainees, and postponing scheduled consular interviews for quarantined detainees.

While few on the list of the quarantined are actually sick, all have been potentially exposed. ICE policy is to quarantine for 25 days since the last incubation, so those affected have a long wait ahead of them. And while the quarantine inhibits access to immigration lawyers, the legal deportation processes are not delayed.

And the immigrants are not the only ones affected — border officials are suffering too. “Their morale is impacted. They’re tired. A lot of them have gotten sick. They’ve been exposed to flu, chicken pox, measles, mumps — all kinds of challenges in terms of the medical care,” Acting Department of Homeland Security (DHS) Secretary Kevin McAleenan said. “They’re spending time overnight in hospitals instead of patrolling the border.”

Conditions in the detention centers are not conducive to containing the spread of these dangerous viruses. The DHS inspector general has warned of “dangerous overcrowding” in many of the facilities. “Corrective action is critical to the immediate health and safety needs of detainees, who cannot continue to be held in standing-room-only conditions for weeks until additional tents are constructed,” his report said.

The White House is seeking $4.5 billion in emergency funding to respond to the many difficulties that continue to plague the border. “Given the scale of what we are facing, we will exhaust our resources before the end of this fiscal year,” McAleenan told a House appropriations subcommittee.