Uy, totally normal yan! A few of us moms noticed na after vaccination, may slight fever or parang off ang baby for a day or two, it's actually a sign na gumagana ang vaccine, kaya nag-aact out ang immune system niya. Just keep baby hydrated, monitor the temp, at bigyan ng paracetamol if needed based sa dosage. If the fever goes beyond 38.5°C or lasts more than 2-3 days, or kung nakikita mo na may iba pang concerning signs, better to call your pedia to be sure, pero most of the time okay lang yan after a few hours of rest.