Walmart, the world's largest retailer, is the latest national chain to require all customers to wear masks.  The change begins on Monday, July 20, 2020.

Starbucks said last week that it will require customers to wear facial coverings or masks in all 9,000 of its company-owned US stores beginning today.

Best Buy announced Tuesday that it will also require all shoppers coming into its approximately 1,000 stores to wear face masks. 

Although no federal mandate to wear a mask exists, the Centers for Disease Control and Prevention says everyone "should wear a cloth face cover when they have to go out in public." The CDC said "face coverings are meant to protect other people."