Four detainees at the Eloy Detention Center have chickenpox.
Another 16 detainees may have been exposed and are being closely monitored by Immigration and Customs Enforcement Health Service Corps staff, ICE spokeswoman Yasmeen Pitts O'Keefe said in a statement.
The detention center houses 1,418 people arrested on immigration-related charges.
ICE has stringent protocols in place to prevent the spread of illness and treat detainees who are diagnosed with an illness, Pitts O'Keefe said.
Children infected with chickenpox usually recover completely, according to the Centers for Disease Control and Prevention. However, the disease can be serious or fatal for babies, pregnant women, adolescents, adults, and people with weakened immune systems.
