Influenza, Flu Shots, and Vitamin D
This is only one of dozens of articles linking Vitamin D deficiency with influenza.
Thought strictly anecdotal, I started taking a vitamin D3 about a 18 months ago, I have not been sick even once, not even a sniffle.
I had the flu once this year. It happened about three days after I ran out of D3. When my order finally arrived I was too sick to keep the capsules down. I haven’t allowed myself to run out again. I think this is also a great time to increase my family’s probiotic intake.