California's strict vaccination laws may only have a small effect
Officials in US states and cities are trying several strategies to limit the number of people who go unvaccinated, which has become more urgent after recent outbreaks of vaccine-preventable diseases. In California, these measures have resulted in a slight decrease in the number of unvaccinated children in schools, but they haven’t fully counteracted the effects of hesitancy over whether to vaccinate.
California passed a law in 2015 that banned non-medical exemptions based on religious or philosophical beliefs for parents who wanted to opt out of vaccinating their children. It is not the only place to do so – Washington state enacted a similar law in 2019, and New York City went so far as to mandate that all people in an area with a large measles outbreak had to be vaccinated or face fines. But will these laws work?
Source: New Scientist