Donald Trump, who is set to return to the White House after his victory over Kamala Harris in the US presidential elections, has appointed anti-vaccine activist Robert F Kennedy Jr as his secretary of the health department. Kennedy, who dropped his independent presidential campaign in August and endorsed Trump, has expressed his commitment to prioritising the fight against chronic diseases. However, his stance on vaccines sets him apart from previous Health and Human Services leaders. Here's NDTV World's Vishal Vivek with more details.