Oregon Pediatric Society

The absence of Democratic Sen. Betsy Johnson has allowed Bend Republican Sen. Tim Knopp to block a bill that he feels would infringe upon religious freedom by requiring parents to show informed consent before their unvaccinated children can enter public schools.

February 21, 2013 — By the end of the 20th Century, vaccines had once common illnesses like polio and measles and whooping cough down for the count. But once rare infectious diseases have started returning in the past decade, as more and more parents have stopped having their children vaccinated.