I was told he would have no reaction as this is his 3rd time getting the vaccine have waited two years to get this vaccine since the last one he had he got a staff infection as well. His shot was January 17th he had itched at it for 3 days the night on January 20th it started to appear extremely swollen and by the morning of January 21st his arm was 5x the size I called office to be seen the refused to see him so that?s when I rushed to the emergency room where they gave him his first round a Benadryl and perscribed him cephalexin he has currently had 3 doses of if and the swelling and irritation has not reduced at all