Monday 16 March to Friday 3 April 2020 — On 31 December 2019, the WHO China Country Office was informed of cases of pneumoniaun known etiology (unknown cause) detected in Wuhan City, Hubei Province of China. From 31 December 2019 through 3 January 2020, a total of 44 case-patients with pneumonia of unknown etiology were reported to WHO by…