Because vaccine policy is political in nature, different states in the United States are dealing with bill debates differently.
We bring you up to date with a couple of previous news items we blogged about last year, and we present you with an undercover investigation by CBC-Radio Canada about the anti-vaccine movement.
Another physician in California allegedly sold unnecessary vaccine exemptions at $1,000 a pop.
Every time there is a vaccine requirement, vaccine-hesitant parents will find a way around it, placing children at increased risk of contracting diseases.
Political fights over vaccine requirements are not new, but they still make it difficult to fight off epidemics of vaccine-preventable diseases. One such fight seems to be looming in California after Governor Gavin Newsom has expressed concerns over a recent bill aimed at reducing medical exemptions to immunization.