Positive change not only requires a valid argument, it requires political will. My colleagues and I have been pointing out for years that vaccines are safe and effective, and the anti-vaccine movement, which is built largely on misinformation, threatens the public health by eroding herd immunity. These arguments are no more valid today than they were five or ten years ago (except that new scientific evidence continues to support our conclusion).
We also predicted that it will likely take the significant return of vaccine-preventable diseases to muster the political will to effectively push back against the anti-vaccine movement. Parents need to be more afraid of infectious disease than the false fearmongering surrounding vaccines. We, of course, did not want this to happen, we just thought this was a likely scenario.
I did not think, however, that it would be so sudden and dramatic. The Disneyland measles outbreak created an undeniable media and popular backlash against the anti-vaccine movement. Recent evidence for this is the Jimmy Kimmel segment in which he blasted anti-vaxxers and showed a fake PSA in which real doctors express their frustration over vaccine refusers. Anti-vaxxers replied with their usual shrill nonsense, comparing Kimmel’s statements to hate speech and falsely accusing him of attacking autistic children. Kimmel responded with still more ridicule, making a mockery of anti-vaxxer tweets attacking him. Being the butt of late night comedian jokes is a reasonable sign of popular backlash.
Popular opinion, which is turning against vaccine refusers for threatening the public health, translates into political will. In the case of vaccines there is a specific focus for this political will – state laws allowing exemptions from the requirement for children to be up to date on their vaccines in order to attend public school.