Whats In The Flu Vaccine? Dr Neil Explains [ThjaXE0w4Un] Published in Everyday Knowledge Our public health doctor Neil explains what's inside the flu vaccine and how it works. d0VbmhAmISM JM9ETILrNzJ nUOfTtqhhkt MXCCwuHxTpH HpPPu0sbw2t klhi1sEcKzF 14El67Bd6de