Question
A young child began experiencing a high fever at around 3 pm the day before yesterday after being vaccinated with the H1N1 vaccine. The fever intensified around 11 pm last night. This morning at 10 am, a fever-reducing injection was administered and a compound zinc ointment was taken, but the current body temperature remains at 39.5 degrees. How can one effectively control the low-grade fever, and is it necessary to change medications? What adverse reactions might occur after vaccination?
Answer
It is common for there to be some degree of reaction after vaccination, and these reactions typically do not require treatment and will heal on their own after a few days. Common local reactions include redness, swelling, and pain, which usually appear within 12 to 24 hours after vaccination and subside within 48 to 72 hours. Lymphadenopathy or lymphadenitis may occur between 24 hours and 1 to 2 weeks or longer after vaccination.