New Delhi, Nov. 20 -- In a significant shift, the US Health and Human Services Secretary, Robert F. Kennedy Jr's Centers for Disease Control (CDC), on Thursday said that claims about vaccines not causing autism are not 'evidence-based'.

Earlier, the CDC's website said that studies have shown there is no link between receiving vaccines and developing autism spectrum disorder.

However, updating the webpage, CDC said,"The claim 'vaccines do not cause autism' is not an evidence-based claim because studies have not ruled out the possibility that infant vaccines cause autism."

It further added that health authorities have "ignored" studies supporting the link between the two.

RFK Jr. and Trump have promoted the theory that childhood vaccine...