Inspired by the fact that I am currently sick with the 'Rona (it finally got me after almost 3 years), today I give the world (of D&D) a way to cure a lot of people of a chosen disease.
While copper and silver won't do anything against a virus, they are both antibacterial and made sense as a material component. Everyone always has powdered silver for spell use, but you may have to go on a hunt for someone that can or will turn copper into a powder.
This should give those high level clerics (or others, but cleric sounds good) something to do with their higher level spell slots that is just a boring ol' fire storm.