An outbreak of chickenpox has forced the temporary closure of a shelter housing Central American migrants sent to Mexico from the United States, Mexican authorities said on Friday, as officials sought to contain the highly contagious virus.

Axar.az reports citing Reuters that the shelter in the northern city of Ciudad Juarez, across the border from El Paso, Texas, closed on Thursday after 72 people, including 69 children, were diagnosed with the virus, officials in Mexico’s Chihuahua state said in a statement.

Most people infected with chickenpox simply feel unwell - with symptoms including an itchy, blister-like rash, fever, headache and fatigue - but some develop serious complications.

The shelter, which is run by Mexico’s federal government, did not respond to a request for comment.

A federal official said the virus was spread by a Honduran girl returned to Mexico by the U.S. government under Washington’s Migrant Protection Protocols (MPP) policy, Mexico’s El Diario newspaper reported.