Originally Posted by Freudian Slit
On another board I read, someone claimed they were sick for several weeks because they kept getting reinfected with the same cold, so after disinfecting their stuff, they recovered. However, I thought that once you recovered from a virus, you were immune to it. You can get another mutated strain, but wouldn't the cold virus you just had not affect you anymore?
You do generally acquire immunity once you have a cold virus, but there are something like 100 different strains floating around. This person could have had a very long cold, or could have caught a different strain after just getting over one. Happened to me a couple of months ago. I had one day of feeling healthy between bouts of virus.
Think of it this way. If you have a cold, you have virus in your system. Your immune system goes to work on defeating it. If you are exposed to the same virus again (say you sneeze on your keyboard), you are getting exposed to a virus that's already in your body anyway. So how can you get sick all over again?