Sunblock
Can UV Light Kill Coronavirus?
A particular spectrum of ultraviolet light, far UV-C, "efficiently inactivates bacteria without harm to exposed mammalian skin," according to a study published in Nature.
https://www.digitaltrends.com/news/can-uv-light-kill-coronavirus/
How Does Sunscreen Work? | Live Science
Some inorganic chemicals, including minerals such as zinc oxide or titanium dioxide, act as a physical sunblock. They reflect UV rays, similar to how white paint reflects light. The white-colored noses on beach-goers in the 1980s and 1990s were due to these compounds; because manufacturers make the inorganic particles much smaller now, we don't see the visible white.
Along with inorganic chemicals, sunscreens often contain organic chemicals, with names such as avobenzone or oxybenzone. Instead of physically deflecting UV light, these molecules absorb UV radiation through their chemical bonds. As the bonds absorb UV radiation, the components of the sunscreen slowly break down and release heat.
https://www.livescience.com/32666-how-does-sunscreen-work.html
Avobenzone Containing Sunscreens can cause hormone disruption - and are even more toxic when exposed to chlorine; Avobenzone degrades when it is exposed to the sun which results in harmful free radicals being released into the body. These free radicals can accelerate the aging process and increase the risk of illness including cancer.
https://tropicsport.com/blogs/posts/what-s-wrong-with-sunscreens-containing-avobenzone
Oxybenzone absorbs harmful UV light, but it's also believed to cause hormone disruption and cell damage, which could trigger cancer development down the road.
https://livelovefruit.com/does-sunscreen-cause-cancer/
How Sunscreen Could Be Causing Skin Cancer, Not The Sun
while we do indeed need protection to prevent sunburns, blocking out the sun entirely is not ideal. Rich in vitamin D, it offers a number of other health benefits, including, oddly enough, cancer prevention
https://www.collective-evolution.com/2017/02/13/how-sunscreen-could-be-causing-skin-cancer-not-the-sun/
(anon has been wondering about this because anon is old, and lived when the only sun protection was coppertone tanning oil and a hat and sleeves - no one got skin cancer…. until the 80's)