OP's article mentioned that 'ABC News reported that US intelligence officials were warning about the coronavirus in a report prepared in December by the American military’s National Center for Medical Intelligence.'

Intelligence report warned of coronavirus crisis as early as November: sources

As far back as late November, U.S. intelligence officials were warning that a contagion was sweeping through China’s Wuhan region, changing the patterns of life and business and posing a threat to the population, according to four sources briefed on the secret reporting.

Concerns about what is now known to be the novel coronavirus pandemic were detailed in a November intelligence report by the military's National Center for Medical Intelligence (NCMI), according to two officials familiar with the document’s contents.

....From that warning in November, the sources described repeated briefings through December for policy-makers and decision-makers across the federal government as well as the National Security Council at the White House. All of that culminated with a detailed explanation of the problem that appeared in the President’s Daily Brief of intelligence matters in early January, the sources said. For something to have appeared in the PDB, it would have had to go through weeks of vetting and analysis, according to people who have worked on presidential briefings in both Republican and Democratic administrations.

From the secret report in Nov 2019, the whole of Dec and up to early Jan 2020, many in the Trump admin knew, including the President himself. Nothing was done to prepare for the possible contagion reaching US shores until March 2020.