A US cardiologist claims in an interview spreading across social media that people who have received the Covid-19 vaccine could pass on messenger RNA (mRNA) to the unvaccinated through close contact, causing harm. This is false; the shots approved in the US and Canada do not contain live, weakened versions of the coronavirus, and the studies referenced in the video do not prove the jabs pose a threat. "If your (sic) unvaccinated, see this update on the potential threats to you from those mRNA vaccinated via shedding," says a November 30, 2022 Instagram post sharing footage of Peter McCullough, a...