Fig. 1.

Number of reported human cases and positive virological samples from birds or the environment, by province and origin as of March 2018. Data include both high and low pathogenic H7N9 viruses. The yellow charts indicate the number of positive virological samples from birds or the environment of the total of the first four waves. The orange charts indicate that of the five waves. The shallow green charts stand for the number of the total reported human cases of the first four waves and the deep green ones stand for that of the five waves. The five waves almost count the sum up of the first four waves both in human and animal. Poultry data comes from FAO [53]. Human data comes from WHO [1]