There are two possible reasons for why the oral polio vaccine ("polio drops") might not be given to children or infants with diarrhea. The first reason would be that this vaccine, like any other, triggers a minor immune response. The purpose of a vaccine is to train the body to recognize and fight off specific infections by introducing a weak or dead form of the virus. After a vaccine, it is common to experience minor... There are two possible reasons for why the oral polio vaccine ("polio drops") might not be given to children or infants with diarrhea. The first reason would be that this vaccine, like any other, triggers a minor immune response. The purpose of a vaccine is to train the body to recognize and fight off specific infections by introducing a weak or dead form of the virus. After a vaccine, it is common to experience minor symptoms associated with that illness. For example, someone who has received the flu vaccine may feel a little feverish, fatigued, or...