Northern Mama-think about this. I would a LOT rather see a farmer or ditch digger in their work clothes in the store than I would a health care worker. THEY are the ones who really should change. They are the ones who are at highest risk to be carrying resistant strains of heaven knows what. However, any person on the street may be carrying MRSA. Many are. You are probably much better off in GH's grocery store than you are walking the streets of most major cities.
I would also bet that GH could probably do a lot better without your business than you would without the food she provides. JMHO.