I had the flu a week ago(7 weeks post op). This did not cause me to have any stomach issues or vomiting. I had high fever, dizziness, body aches, cough etc... I took a trip to the ER thinking it was a leak or something. They gave me 2 liters of IV Fluid and sent me on my way. They also gave me antibiotics for the cough and yucky looking stuff i was coughing up. I couldn't somach the antibiotics and stopped taking them.
I was in bed for about 5 days and lost 8 pounds. It was pretty miserable, but luckily it didn't happen right after surgery. I couldn't even imagine how that would feel. I was not able to drink much and didn't eat for 2 days. I finally was able to eat chicken Soup and get more fulids in. I was also pretty dehydrated.
I did receive the flu shot back in October, but think this was some other flu virus.