First confirmed case of COVID‑19 found in U.S.
The virus, which would spark a pandemic, was first reported in China on December 31, 2019.
On January 19, a man who had returned home to Snohomish County, Washington near Seattle on January 15, after traveling to Wuhan, checked into an urgent care clinic after seeing reports about the outbreak.
On January 20, the Centers for Disease Control announced that the 35-year-old, who had been experiencing a cough, fever, nausea, and vomiting, had tested positive for COVID-19. He was hospitalized, where his condition grew worse and he developed pneumonia. His symptoms abated 10 days later.