As long as you gain the it back you will be ok. I was sick with H1N1 fo two weeks and i lost 20 pounds that I really couldn't loose, I ended up being in the hospital for a week and a half because i was couldn't eat anything, I had a temp. of 117. It took about two months to gain the it back but now i'm fine. Pretty much you just need to make sure that you gain back the wait you lost.
