A person walks down a sidewalk in Brooklyn, New York, on March 28. Spencer Platt/Getty Images

The Centers for Disease Control and Prevention issued a travel advisory on Saturday, urging residents of New York, New Jersey and Connecticut “to refrain from non-essential domestic travel for 14 days effective immediately.”

Employees of critical infrastructure industries, including but not limited to trucking, public health professionals, financial services, and food supply, were exempt from the advisory.

Those working in these critical infrastructure industries, as defined by the Department of Homeland Security, were deemed to need to keep a normal work schedule.

According to the CDC, the governors of the three states will have “full discretion” on how to implement this advisory.