California has a problem with people who have decided it's within their freedoms to not have their kids vaccinated. Now they have a measles outbreak.
I'm willing to go on record as being in favor of mandated vaccinations. Are they risk free? No, not completely. I am also in favor of speed limits, stoplights, and bans on drunk driving, largely on the same grounds, even though P.J. O'Rourke makes a wonderful argument to the contrary.
But in both cases, the risk to others is what establishes the limit on the behaviors I am free to choose to engage in.