A public health alert has been issued for anyone who visited the BJ's Wholesale Club in Watchung, N.J., between 1:30 and 4 p.m. on June 3.
State health officials say a person confirmed to have measles may have exposed those at the store to the highly contagious illness.
The state is urging anyone who visited the BJ's at the time to contact a health provider to discuss potential exposure and risk of measles.
Measles is spread through the air when an infected person talks, coughs or sneezes. People can also get sick when they come in contact with mucus or saliva from an infected person.
Symptoms include a rash, high fever, cough, runny nose and watery eyes. Those exposed at the BJ's may develop symptoms as late as June 24.