Trump has systematically undermined trust in the media and other institutions that play important roles in public health emergencies. He has explicitly said not to trust sources that he doesn’t personally approve.

He has engaged in what several columnists have called a “war on expertise.” 

…”[Trump] has lied about everything from trade deficits to Russian interference in US elections. He has disparaged experts at almost every opportunity,”

…”Trump’s disdain for science and his cuts to science and public health programs have subverted preparedness for emergencies like the coronavirus.”

… Trump claimed on Monday that the coronavirus was “very much under control in the USA.” A day later, the Centers for Disease Control and Prevention said the virus’ spread to the US was inevitable. He said the stock market is “starting to look very good” even as the Dow was nosediving amid coronavirus anxiety.

…Trump’s free-flowing falsehoods undermine the credibility of the government leaving the public unsure of who or what to trust.

Trump’s war on truth takes a dangerous turn as he attacks the media’s coronavirus coverage – CNN

hmmm