One cup of coffee is good for you, two is better, and three is best...even decaf. It has health benefits that make it part of the prevention strategy for COVID-19/Flu/RSV.
Decaf coffee may present some health hazards though. Make sure the caffeine has been extracted through the "Swiss water" process. They may also be labeled "solvent-free" or "chemical-free." Avoid decaf prepared with solvents such as methylene chloride (paint stripper) or ethyl acetate (the stuff used in nail polish remover).
You can find safe brands here.
RE: Decaf is my new coffee routine!