Two emergency doctors in the US are in a critical condition after they were infected with the coronavirus, according to the American College of Emergency Physicians (ACEP).

One doctor is in his 40s in the state of Washington, the second is a 70-year-old from New Jersey.

The physician in Paterson, NJ, leads his institution’s emergency preparedness and was admitted to the hospital several days ago with upper respiratory problems. He remains in isolation in its intensive care unit.

ACEP President William Jaquis said: “I am deeply saddened by this news, but not surprised. As emergency physicians, we know the risks of our calling. We stand united with our colleagues and our thoughts and prayers for a full and speedy recovery are with each of them and their families.

"It is my hope that these colleagues and their cases serve as a reminder to each of us to stay vigilant. This virus is dangerous, and its impact is still unfolding," Jaquis added.

"As emergency physicians, we answer the call to care for our most vulnerable, even at great personal risk. Knowing that, I urge each of you to meticulously follow the recommended precautions to protect yourself."