Cathy/Karen,
I have never taken Vitamin C supplements and on the average, I get a cold about once every three years. I can be around a houseful of people with colds and they just affect me once in a while. The last one was November 2002 and I had a temporary office in the hallway facing the north and it was 10 degrees (f) below zero with the wind howling in on my all day. I took some zinc lozenges and it cleared up in 2 days. I guess I am just fortunate.
Ed