Ive always had a good immune system, I rarely get sick as for the flu maybe once a year. The last 6 months ive had the flu about 3 times along with diarreah, and its happening again now, I have extremely bad diarreah and apart from that and the stomach pains i feel fine, last night I vommited once and that was it, should I be concerned? I have no health problems that I know of