The first U.S. case of COVID-19, the illness caused by the novel coronavirus, progressed from mild symptoms into pneumonia after just 9 days.

“A multifaceted team of Washington-based investigators documented the identification, diagnosis, clinical course, and management of the first case of COVID-19 in the United States. They believed that doing so would help rapidly disseminate clinical information related to patient care as the virus spreads.

“They described that a 35-year-old man decided to visit a health care provider after seeing alerts from the US Centers for Disease Control and Prevention (CDC) about recent travel to Wuhan, China. The man had recently returned to Snohomish County, Washington from China and after 4 days with a cough and fever, visited an urgent care center. He put on a mask in the waiting room and was taken to an examination room after 20 minutes, the case report stated, where he disclosed his recent travel.”

Read more at Contagion Live about the case report published in the New England Journal of Medicine.