evidence: Dr. Anthony Fauci, the government's top infectious diseases expert, emphasized the dangers of Covid-19 on Tuesday, contradicting President Donald Trump's false claim that the coronavirus was only as deadly as the flu. [...] Asked about Trump's messaging, Fauci opted not to antagonize the president. [...] Fauci has previously disagreed with Trump, and survived a White House attempt to discredit him after he contradicted the president's more optimistic assessment of the progress of the pandemic.