During these mass vaccinations events here in the city where I live they ask to sit quietly for about 15 minutes before leaving. The first Pfizer jab at the football stadium I saw a young woman being attended to by a nurse. She was obviously experiencing immediate immune response reactions. If her situation worsened, she would have been transported to one of the ERs in the city. How many were in the stadium at the time sitting quietly? <br /> <br /> Hundreds.