I have it really bad, had it since about 1968 (the last time I actually threw up!). When I hear "There's a stomach bug going around" I can hardly eat, I spazz out. When my daughter was little and would get a stomach ache if I didn't take a Xanax I'd be up the entire night bolting up right at any sound that she may be getting up to use the bathroom! I'd go the whole next day maybe eating only 2 Oreos hoping that if there was no food in my stomach if I got sick there'd be nothing to throw up. (I never did get sick from her, but that fear was debilitating)
When I make chicken I wash my hands about 50 times, I sterilize the counter, I cook like I am in a sterile environment (and maybe it works because my husband of 33 years has never had a stomach bug, my daughter is 26 and hasn't been sick like that since age 8 - so maybe the key is be very sterile with your cooking - they say MOST stomach bugs are actually food poisoning. So you do have a lot of control.