FluMist
"My two year old had the Flu Mist vaccine on a Monday morning.  By Monday evening he had a fever, no energy or appetite and wanted to go to bed.  Tuesday his temperature spiked to 104.5 and he had achy arms and legs, head and tummy.  Still had a fever all day Wednesday but started taking fluids again, still not eating.  When he was one he had the shot and had no reaction.  I think we'll stick with the injection from now on."