(Reuters) The California lawmker who made it harder for parents to opt out of vaccinating their children, a stance that earned him death threats, is now launching a campaign to save his job, days after the state certified a recall effort against him.

Democratic State Senator Richard Pan, a Sacramento pediatrician who introduced a measure eliminating California’s personal beliefs exemption to vaccination requirements for schoolchildren in response to a measles outbreak at Disneyland, plans to go public on Wednesday with a website and social media campaign aimed at fighting off the recall drive, a spokeswoman said.

“I won’t be detoured from taking on the tough issues that are important to people in my district simply because there are some that use anti-science rhetoric to ignite division and fear,” Pan said in a text message to Reuters.

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