time for the doctor. >> that's right. a mom mourning the lot of her 19-year-old son of the she claims her son, happened letter h a deadly reaction to the flu shot and joined us yesterday on "fox & friends." >> after he got the shot, he got violently ill. he went to one emergency room and wasn't treated and then a few days later, he was admitted, went to the next emergency room. the doctors didn't know what happened. the doctors did everything they could as far as trying to detect this. the one thing they didn't really focus on until the very end and another doctor was the flu vaccination. >> sad situation indeed. trying to find out if this could really happen. joining us is dr. mark siegle with fox news medical a team. we're so glad you're here. >> good morning. >> good morning. a tough moment there to hear that from a mom. you're just trying to do the right thing for your family, advising flu shots.