But the law lacks such specifics, defining misinformation only as “false information that is contradicted by contemporary scientific consensus contrary to the standard of care.”

Michelle Mello, a professor of law and health policy at Stanford University, said the wording is confusing.

“On a matter like covid, science is changing all the time, so what does it mean to say there is scientific consensus?” she asked. “To me, there are lots of examples of statements that clearly, with no vagueness involved, meet the definition of the kind of conduct that the legislature was going after. The problem is that there are all kinds of other hypothetical things that people can say that don’t clearly violate it.”

“I don’t see medical boards being particularly vigorous in policing physicians’ competence in general,” said Stanford’s Mello. “You have to be really bad to get their attention.”