Governor Andrew Cuomo has announced the creation of a “containment area” in New Rochelle, which contains a cluster of people in New York who have tested positive for the coronavirus and are being isolated, New York City health officials announced Tuesday.

“The infected people will be in a quarantine area in New York and will be isolated from others,” Governor Andrew Cuomo said in a statement during a press release.

More than 142 people in New York state have tested positive for coronavirus in recent weeks, with most traced back to a lawyer in residing in Westchester, N.Y.

The containment area is the first mandatory quarantine to be declared in the United States for anyone who could have been exposed to the coronavirus.

A fully stocked National Guard unit will be on hand in New Rochelle with medical and food supplies for those impacted.

This is not the first measure implemented in New York as a precaution against the outbreak. On Monday, Governor Cuomo announced that New York will manufacture its own supply of hand sanitizer to make up for the current shortage.