Food and Drug Administration Commissioner Stephen Hahn and Centers for Disease Control and Prevention Director Robert Redfield, both task force members, said they are self-quarantining or teleworking for two weeks after exposure to a coronavirus case at the White House. On Saturday night, a spokeswoman for Anthony S. Fauci, the government’s top infectious diseases official, acknowledged that working from home sometimes will be among the precautions he is taking.

But several administration officials said White House staffers were encouraged to come into the office by their supervisors, and that aides who travel with President Trump and Vice President Pence would not stay out for 14 days, the recommended time frame to quarantine once exposed to the virus…

Agents on the president’s detail — who work in three rotating shifts — typically huddle in a small “down room” a floor below the Oval Office when Trump is there. Those agents have been wearing face masks for several days, according to one administration official, due to concerns they cannot appropriately distance in this confined space.

But other Secret Service agents are not wearing masks on campus, according to two senior administration officials who interact with Trump.