Honestly there is none. We are in a pandemic. All N95s have gone to medical personnel. They must be able to get through and remain well or all in their care are doomed. Read up on how to make your own masks with search engines. You often do not even need a sewing machine. Two layers of cotton that is fine such as high thread count sheeting works well and a coffee filter between layers all the better. Do the best you can; maintain the distance from others.
There are a lot of strategies that lessen risk to workers such plexiglass shields between the till and customers, requiring all customers to mask and sanitize their hands before entry, one way aisles and distancing clues marked out on the floor - unfortunately if management refuses implement these measures employees have to either suck it up or go awol.
Reach out to your community and see if there is help. Lots of people are making homemade masks-these masks aren’t very effective but they are better than nothing. N95 respirators are being pulled from shelves and donated to health care workers and first responders.
Reach out to your community and see if there is help. Lots of people are making homemade masks-these masks aren’t very effective but they are better than nothing. N95 respirators are being pulled from shelves and donated to health care workers and first responders.