Dr Peter Marks, forced to resign by Trump administration, sees no ‘possible way’ to determine cause by September

The US health secretary, Robert F Kennedy Jr, should not offer “false hope” to families by boasting he can figure out what causes autism as soon as September, says the physician who resigned as the nation’s top vaccine official amid what he called anti-vaccination misinformation from the Trump administration cabinet member.

In an interview during which he alluded to his help helming Operation Warp Speed – the initiative that took only about nine months to develop, manufacture and distribute the vaccines protecting the public from Covid-19 – Dr Peter Marks warned that autism “is an incredibly complicated issue”.

“If you just ask me, as a scientist, is it possible to get the answer that quickly? I don’t see any possible way,” Marks said on CBS’s Face the Nation in a pre-recorded discussion airing Sunday.