Yup yup yup I used to get a cold or two and/or the flu every season. I began taking 4000 IU d3, 2000 mg C and 30 mg zinc daily along with a multivitamin during the swine flu "pandemic" in 2005. Beginning in September for the last 5 years I add quercetin to the mix thru May.

The only thing Ive gotten in the intervening 16 years is norovirus a couple years ago that I got from my 3 year old grandson who I had close contact with for several hours a day when my wife was babysitting. Of course pop pop was his favorite toy and it was impossible to not come in contact with the virus.