Do you have any sources to support the claim that's she's anti-vax
I think labeling Stein as "anti-vaxx" is a bit extreme, but she does make roundabout claims on the issue:
There were concerns among physicians about what the vaccination schedule meant, the toxic substances like mercury which used to be rampant in vaccines. There were real questions that needed to be addressed. I think some of them at least have been addressed. I don’t know if all of them have been addressed.
"I think there’s no question that vaccines have been absolutely critical in ridding us of the scourge of many diseases — smallpox, polio, etc. So vaccines are an invaluable medication," Stein said. "Like any medication, they also should be — what shall we say? -- approved by a regulatory board that people can trust. And I think right now, that is the problem. That people do not trust a Food and Drug Administration, or even the CDC for that matter, where corporate influence and the pharmaceutical industry has a lot of influence."
On homeopathy, Stein has said:
For homeopathy, just because something is untested doesn't mean it's safe. By the same token, being "tested" and "reviewed" by agencies tied to big pharma and the chemical industry is also problematic. There's a lot of snake-oil in this system. We need research and licensing boards that are protected from conflicts of interest. They should not be limited by arbitrary definitions of what is "natural" or not.
It seems like if she were simply for vaccines and against homeopathy she wouldn't have to give such convoluted, long-winded response. But alas, her success relies on pandering to the anti-vaxx crowd.