I've only been sick 3 times in the last ten years. Even when I was a teen I can go around 2 or more years without being sick. The only times I remembered of being ill was when someone sneezed or cough on me. So last time I was sick was 2006 and before that 2002 and got sick once in 2000. I guess one of the factors could be that I work out 4 times a week and eat a lot of vegetables and fruits with minimal intake of red meat and I'm pretty sure my immune system is quite strong.

Maybe some of you guys need to check yourselves out and see a doctor, continually getting sick means a compromised immune system and probably other underlying issues.