Not as big as you are thinking the MMR is normally given after one year. This is because there are some know potential negative side effects when babies get it earlier.
The point is that society already evaluates these hazards/risks very effectively so that individual parents don't need to. Indeed any individual parent's risk analysis about vaccines is likely to put their children at greater risk.
The point is that society already evaluates these hazards/risks very effectively so that individual parents don't need to. Indeed any individual parent's risk analysis about vaccines is likely to put their children at greater risk.