Vitamin D is a miracle vitamin. I have been taking daily doses religiously since reading about it after mom died of pancreatic cancer. I add zinc with it now to help ward off any covid cooties.
Use to get every bug that went through my office.
About 10 years ago read a study out of Japan that showed Vitamin D helps ward off viral infections. So started taking D ever winter.
Only got an office bug in the beginning of one winter when I forgot to start taking it.
I run all over this place outside naked. Mor Vit D and it also keeps people a lot ways from me so double duty.