Thank you for your your question. There can be transient side effects of taking the flu shot such as pain at the injection site, aches, fever, and headaches. These symptoms can last for around 5-7 days. In the meantime, you can treat your husbands symptoms with oral analgesic medication such as ibuprofen. Should these symptoms continue beyond seven days, we strongly recommend that you have your husband go back to his doctor for further evaluation.
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