California may have closed a chapter in its bitter fight over mandatory vaccines for children, but a new billboard campaign by opponents of the state's pro-vaccination law shows the controversy is far from over. Billboards questioning the safety of vaccines have popped up over the past couple of months from Berkeley and San Francisco to North Fair Oaks. More went up in January in the San Jose area to coincide with Super Bowl 50. The billboards, [which] proclaim that vaccines pose serious health risks ... are the brainchild of Brandy Vaughan, founder of the Council for Vaccine Safety [and former] sales representative for Merck. Vaughan was an outspoken opponent of SB 277. The legislation, signed in June by Gov. Jerry Brown ... eliminated personal belief or religious exemptions to mandatory vaccines for school-age children. Though an effort to repeal the law fell apart, [mandatory] vaccinations continue to be a highly charged and divisive issue across the nation. Vaughan has raised $10,000 online for a dozen billboards in the Bay Area. "We're no longer the land of the free if we give up the choice of what we put in our body," said Vaughan. "My goal is to educate the public and encourage people to do their own research and connect the dots." She calls for tighter government regulation of vaccine-makers and suspects that America's growing vaccination regime is responsible for various health conditions.