As of April 19, 2013 (17:00 Beijing Time), additional four cases of human infection with influenza A(H7N9) virus were laboratory confirmed (17:00 April 18-17:00 April 19 Beijing Time). One case is  from Jiangsu and the other three from Zhejiang.

To date, a total of 91 cases have been laboratory confirmed with influenza A(H7N9) virus in mainland China, including 7 recovered and discharged, 67 in hospitalization and 17 deaths. These cases are distributed over 6 provinces/municipalities, including Beijing (1 case, 0 death), Shanghai (32 cases, 11 deaths), Jiangsu (22 cases, 3 death), Zhejiang (30 cases, 2 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.