hello doctor my son 10months old took mmr vaccine one week back n doctor told he will get fever after 1 week n now from past 3days he is having on n off fever, I am giving CALPOL drops, morning he is a bit fine, in the evenings there is fever of about 101 , from past three days this is only happening, he also has cough, when consulted doctor 3days back he gave rapidus syrup n hicet ax syrup. I want to no why there is fever even after 3days, is it vaccine effect or viral fever.