nostr:npub1klcft40hs3v7wuk7593j6fqfdndmws0j8vhsghmg2nswrwy9z8wshyz8dr What did large daily doses of VitD, leading to 50ng/ml or greater concentration in blood do for me? Despite previous frequent colds and flu, despite extreme exposure and aging (contacts with 100s of students daily and frequent domestic/international travel for crowded conferences and worldwide scattered family) since 2002 I had ZERO instances of any respiratory tract illness. No vaxx of any kind too. Even through CV times I travelled several times for crowded overseas events. Nothing.