Two human H7N9 cases have been confirmed in Ningbo City of east China´s Zhejiang Province since 2016, local health authorities said on Monday.

The two patients, one of whom is in a critical condition, are both from Yinzhou District, said Nongbo´s Health and Family Planning Commission.

It did not reveal any further information about the two patients.

No deaths from H7N9 have been reported in Ningbo so far.

H7N9 is a bird flu strain first reported to have infected humans in March 2013 in China. It is most likely to strike in winter and spring