December 21: Wuhan doctors begin to notice a “cluster of pneumonia cases with an unknown cause.” December 25: Chinese medical staff in two hospitals in Wuhan a

December 21: Wuhan doctors begin to notice a “cluster of pneumonia cases with an unknown cause.” December 25: Chinese medical staff in two hospitals in Wuhan are suspected of contracting viral pneumonia and are quarantined. This is additional strong evidence of human-to-human transmission. December 30: Dr. Li Wenliang sent a message to a group of other doctors warning them about a possible outbreak of an illness that resembled severe acute respiratory syndrome (SARS), urging them to take protective measures against infection. December 31: The Wuhan Municipal Health Commission declares, “The investigation so far has not found any obvious human-to-human transmission and no medical staff infection.” This is the opposite of the belief of the doctors working on patients in Wuhan, and two doctors were already suspected of contracting the virus. January 1: The Wuhan Public Security Bureau issued summons to Dr. Li Wenliang, accusing him of “spreading rumors.” Two days later, at a police station, Dr. Li signed a statement acknowledging his “misdemeanor” and promising not to commit further “unlawful acts.” Seven other people are arrested on similar charges and their fate is unknown. January 3: The Chinese government continued efforts to suppress all information about the virus: “China’s National Health Commission, the nation’s top health authority, ordered institutions not to publish any information related to the unknown disease, and ordered labs to transfer any samples they had to designated testing institutions, or to destroy them.” Roughly one month after the first cases in Wuhan, the United States government is notified. Robert Redfield, the director of the Centers for Disease Control and Prevention, gets initial reports about a new coronavirus from Chinese colleagues, according to Health and Human Services secretary Alex Azar. Azar, who helped manage the response at HHS to earlier SARS and anthrax outbreaks, told his chief of staff to make sure the National Security Council was informed.