Anyone dying of the flu is almost certainly deficient in vitamin d. Some say vitamin d deficiency is an actual CAUSE of the flu.
One must enter flu season with blood levels of at least 60. 70-90 if you are Immune deficient or fighting other illnesses.
To get there, you should get a blood test and add supplemental d3 daily until you reach that level. To save $ and time on testing and such, right now start taking a solid decent brand at a health food store (not cvs or some other cheap source) of at least 5000 IU of vitamin D3 daily. You might still be exposed and you might even still get the flu. But your risk of a bad, deadly case just dropped nearly to zero once you’ve gotten enough D3 into your system. It’s cumulative and could take a few weeks.
Some recent studies at that link.
Oh, and by the way, here is how to supplement d in tiny, even newborn babies. Place one drop of baby vitamin D3 at 1000 IU/drop (at any good health food store or amazon) on the nipple (of mom or a bottle) and baby will ingest. Do this once a day if baby is healthy. If baby is teething or under the weather, do this twice a day to get 2000 IU into him. There is no excuse for grandma or new baby to be vitamin D3 deficient.
good info...bkmk
ANYONE taking Vit D3 should also be taking Vit K also...