Tired of being sick

I cannot remember the last time I felt 100% if ever.  I have an Immune Deficiency which leaves me wide open to infections.  When I get sick I get really sick, I had the chicken pox 3 times and wouldn't doubt I would get it again, and I just don't feel good in general. So I'm doing some research, going to start from the inside out and hit the gym on a regular basis. Hopefully 2014 will find me feeling 100%