I'm not concerned about total protection, there are no guarantees in life. But some protection is better than none. N95 refers to 95 percent. I could also wear a full-face shield that I use when working with some power tools. Also a dual-filter chemical mask that I also use. Maybe my welding mask (electronic so a clear viewing glass unless welding). But that is all too extreme. For the brief times we go out shopping for necessities, N95 masks and disposable gloves are pretty good protection versus having nothing. And despite admonitions to stay 6 feet from others, plenty of people do intrude on your space when out.
[[But some protection is better than none.]]
Absolutely- if someone walks through a ‘cloud of virus’ (from someone who sneezed an hour or more before we walked through the same area), and we’re not wearing a mask and glasses, ALL of the virus in the air lands directly on our faces, in our eyes, on our mouth, in our noses, and into our lungs- Wearing masks and glasses cut that amount way way down-
Of course it only takes a small amount of virus cells to infect- but it’s quite likely almost all will be blocked by mask and glasses as long as we don’t touch our faces- clean our glasses immediately after going soemwhere- change our clothes and wash them etc- wash hands- etc-
I suppose getting it will be inevitable after awhile, given how small the virus cells are, and how many there are- but hopefully by then there will be a vaccine- we just have to try to prevent it till then as best we can-