02-01-2016, 05:00 PM
Children who have compromised immune systems, such as cancer patients, cannot receive vaccines to protect them from diseases like measles that could kill them, they rely on the "herd immunity" of all the healthy children around them who do receive the vaccines to reduce the risk to vulnerable children by reducing cases to virtually zero. These children have no "choice" in this matter, even chicken pox or measles could kill them and they cannot be immunized while undergoing chemo or other life saving treatments.