Trader Joe's first major retailer to drop mask requirement for fully vaccinated customers Charles Krupa/AP and last updated 2021-05-14 14:57:14-04 Trader Joe's has become the first major retailer to drop its indoor mask requirement for fully vaccinated customers after the Centers for Disease Control and Prevention revised their COVID-19 mask guideline on Thursday. In an update on its COVID-19 page, the grocery store said they "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." According to USA Today, Walmart and Target are considering making changes to their policies on masks.