Coronavirus likely arrived in US in December, before WHO was informed

On January 19, a 35-year-old man walked into an urgent care center in Snohomish County, Washington, with a cough and a fever. Four days earlier, he had returned from a trip to Wuhan, China. But he was almost certainly not the true first. Since then, a growing number of puzzle pieces have revealed a different picture of the beginning of the country's outbreak.