- Costco tightens face-mask rules, and customers with medical conditions are no longer exempt MarketWatch
- Costco updating coronavirus mask policy to require shoppers with medical conditions to wear face shields USA TODAY
- Costco drops medical exemption, will require all customers wear face coverings KCRA Sacramento
- Costco shoppers with medical conditions now required to wear face coverings, company says KSAT San Antonio
- Costco says all customers must wear a face covering, even those with a medical condition NBC Montana
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Source: Google Finance – Market News