Yes lots of vitamin C. You could also try echinacea with golden seal root- if you can get it. I am convinced that colds are FAR worse these days than they ever used to be, as is flu. The little ******* are getting too clever, and becoming far harder to kill. I used to get a couple of mild colds a year- this year I have been in hospital with pleurisy, had 2 more chest infections and had to take antibiotics 3 times!! Ridiculous. Antibiotics basically don't work. They strip your immune system. I teach kids, and some of them have had constant sore throats/colds for months now. It's not good.