As of April 21, 2013 (16:00 Beijing Time), additional six cases of human infection with influenza A(H7N9) virus were laboratory confirmed (16:00 April 20-16:00 April 21 Beijing Time). One case is from Jiangsu and the other five from Zhejiang.

To date, a total of 102 cases have been laboratory confirmed with influenza A(H7N9) virus in mainland China, including 12 recovered and discharged, 70 in hospitalization and 20 deaths. These cases are distributed over 6 provinces/municipalities, including Beijing (1 case, 0 death), Shanghai (33 cases, 11 deaths), Jiangsu (24 cases, 3 death), Zhejiang (38 cases, 5 deaths), Anhui (3 cases, 1 death) and Henan (3 cases, 0 death). So far, all confirmed human infections with A(H7N9) are sporadic cases, and there is no evidence of ongoing human-to-human transmission.