I got both, the flu (type A) and the strep throat a few weeks ago. I started taking Vitamin D after that. During the weekend I started feeling bad and I thought I was going to catch something. I am doing fine.
Edit: I am taking 5,000 units daily. Didn't have the flu vaccine this year.
Edit: I am taking 5,000 units daily. Didn't have the flu vaccine this year.