Fox News host John Roberts heard some criticism from one of the network's medical contributors on Monday after he said that Colin Powell's death "raised new concerns" about Covid-19 vaccinations. Hours after Powell's death was announced by his family, Roberts angered Twitter commenters by using the tragedy to question the efficacy of vaccines. "The fact that Colin Powell died from a breakthrough COVID infection raises new concerns about how effective vaccines are long-term," Roberts wrote before later deleting the tweet. Fox News host Will Cain and network contributor Tomi Lahren also used the opportunity of Powell's death to rail against vaccine mandates. Dr.