#asktheexpert how many days fever will last after vaccination for a one and half month old baby?

A. After vaccination, it is common for a 1.5-month-old baby to have a mild fever, usually due to the body's normal immune response. The fever typically: Starts within 24 hours of the vaccine. Lasts for 1 to 2 days (sometimes up to 3 days, but rarely more). Other symptoms might include irritability, slight swelling or pain at the injection site, and reduced appetite. What you can do: Give paracetamol drops if prescribed by your pediatrician. Keep the baby well-hydrated (continue breastfeeding or formula). Use lukewarm sponge baths if the fever is high. If the fever lasts more than 3 days, gets very high, or if the baby is extremely fussy, sleepy, or feeding poorly, consult your pediatrician right away.