Don't want to get a vaccine for yourself or your child? Prepare to face the consequences. In the last month, a Detroit mother went to jail because she refused to vaccinate her child. Fifty people lost their jobs at a group of Midwestern hospitals and clinics because they declined a flu shot. And an Oregon university has blocked students from registering for classes unless they have a meningitis shot. All states have some vaccine requirements for public education-no shots, no school. All but three states - Mississippi, West Virginia and California - allow parents to send their child to school without vaccines based on some kind of non-medical exemption. In 2013, more than 90 percent of American children had been vaccinated for chicken pox, hepatitis B, measles, mumps and rubella, according to the Centers for Disease Control and Prevention. However, a significant number of people ... hesitate when a doctor offers them a vaccine. A new study released on Monday found that 27 percent of the parents surveyed could be classified as moderately or highly hesitant around vaccines. That same study found these people may be particularly concerned with the purity of vaccines. Increasingly, parents who choose not to vaccinate are warned of harsh penalties. People who choose not to vaccinate themselves may also face serious consequences. Some states have laws guiding which vaccinations people working at hospitals or other health care facilities must have; more often, requirements may be enshrined in a facility's policy, not in law.