What happens if President Trump contracts COVID-19
A positive COVID-19 test for the president, in itself, is not a cause for emergency action. Millions of people around the world have contracted the disease and have been asymptomatic or mildly symptomatic. The president would likely be able to continue his everyday activities and manage the office either undisturbed or with mild challenges. A presidential diagnosis would create some challenges for those around him. The need for 24-hour Secret Service protection could put agents at risk for contracting it. But given modern technology, the president could quarantine and have remote or sufficiently distanced contact from most, if not all, aides, including the individual(s) who would be involved in the presidential daily brief.
The guy who wrote this at Brookings has suddenly become more popular.