The larger medical science issue here is that vaccines work best when everyone gets them. The more people vaccinated within a community, the more protection against disease is provided to the entire group. This herd immunity fortifies entire populations against disease – including babies who are too young or individuals who are medically unable to get vaccines.
But this shared immunity is compromised in poorer countries where vaccine coverage is inadequate, just as it erodes here in the U.S. when people opt out of receiving vaccines. When it works, herd immunity a beautiful thing. It’s not often a medical treatment not only benefits an individual child, but entire communities, and future generations too.