Good Question: Why Do The Vaccinated Get Sick?On Thursday, the Minnesota Department of Health confirmed that the U of M student sickened with measles had been vaccinated. Last week, the Centers for Disease Control had reported six of the original 52 people who contracted the virus at Disneyland had gotten the shot as well. So how can you get sick if you've had the vaccine? Good Question. The Minnesota Department of Health confirmed Thursday that the University of Minnesota student sickened with measles had been vaccinated.