I'm not sure who was asking what the risk is of Tessa not vaccinating but I think this article explains it pretty well.
Public Health Risk Seen as Parents Reject Vaccines
The way I understand it, most vaccines are not 100% effective so if an unvaccinated kid catches say, measles, the odds are good that not only are the other unvaccinated kids going to get it but some of the vaccinated ones as well. It also puts infants and people who can't receive vaccines at risk.
Public Health Risk Seen as Parents Reject Vaccines
The way I understand it, most vaccines are not 100% effective so if an unvaccinated kid catches say, measles, the odds are good that not only are the other unvaccinated kids going to get it but some of the vaccinated ones as well. It also puts infants and people who can't receive vaccines at risk.