Hello doc, My son is 1 year 19 days old. He got vaccinated (hepatitis) 4 days back. Next day he was fine but after very next to next day he got fever and it’s been 3 days since he has mild fever. Temperature is between 99.6-100.8 all the time. I’m giving him Crocin in every 24 hours. He feels well for few hours but fever returns again. (The temperature never crossed 101) . What should I do? Is it a sign of teething ? Or reaction of vaccine?