mild fever, IMO, no need to give med. overreliant on western medicine is no good for our tod cuz it will never let the body build it's own immune system. If there's fever after jab, it's just a normal expected reaction towards the virus injected into the body. So nothing to worry about if your tods are still active. unless he looks sick and lethargic then there's cause for concern.
for low grade fever, it's always better to give fresh fruit juice(preferably organic ) , lots of water, green bean with china big barley soup, water with bits of korean bamboo salt. honey and lemon. burdock soup. soup and fluids. that's more important, than giving medicine. THat's my 2 cents worth of opinion.