One night this week an urgent appeal went out to a Facebook group of emergency room doctors. “If you were in charge of the Federal response to the Pandemic what would your recommendations be?” asked Dr. Kurt Kloss, a physician based in New York.

The question was hardly theoretical. “I have direct channel,” he added, “to person now in charge at White House and have been asked for recommendations.”

That person, he said, is Jared Kushner, a top adviser to President Trump who has become increasingly involved in the administration’s response to the coronavirus and is also the brother-in-law of the doctor’s daughter, the model Karlie Kloss. Ms. Kloss is married to Joshua Kushner, Mr. Kushner’s brother and a venture capitalist who in 2012 helped found a start-up insurer called Oscar Health.

“Tonight I was asked by Jared through my son-in-law for my recommendations,” Dr. Kloss wrote on Wednesday evening. “That’s when I turned to you guys my fellow BAFERDs for help.” BAFERD is an acronym for emergency room doctors, joined by a number of expletives.