If you tested positive for covid I don't think you can shop at Whole Foods.
Get better. Test negative and you are gtg !
On the side of safety, perhaps consider curbside pickup or online delivery. If you must go, a good mask should be fine but prolonged exposure to and from others could make things worse. Pick only what you're buying and use your knuckles on any buttons. If you can pay with your phone all the better. This virus is waiting for the opportunity to morph again. Exposure fuels it. Be safe and wishing you a speedy recovery. I had it and it only lasted a few days. Vaxxed and boosted. Cheers!
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