Ive been a fan of Chris Masterjohn's in the past (though not followed him much lately) and he had a post on protecting yourself from the Coronavirus on Facebook yesterday. Among his advice tips was to *avoid* taking Vitamin C or D3, and they could cause you issues if you got the virus.

He also recommended taking elderberry syrup (if you can find it, apparently it's sold out most everywhere) daily, whereas other advice I've read has said to avoid elderberry syrup. I just get more and more confused.