Victor Hilitski/For the Sun-Times Trader Joe’s has updated its mask policy and will not require customers who are fully vaccinated to wear a mask. The specialty supermarket is believed to be the first major national retailer to make the change after the Centers for Disease Control and Prevention issued new masking guidelines Thursday. “We encourage customers to follow the guidance of health officials, including, as appropriate, CDC guidelines that advise customers who are fully vaccinated are not required to wear masks while shopping,” Trader Joe’s said on its COVID-19 page that was updated Friday. Related Last week, the company confirmed to USA TODAY that it dropped senior hours at many of its stores, except where required.