In Hong Kong, the first wave of the swine flu epidemic peaked between the third and fourth quarter of the year 2009. This series of maps shows the monthly number of reported cases by district and the cumulative number by DCCA (District Council constituency area) between Day One (1 may) and the end of September. The numbers rose from less than 10 in some districts to over 1000 in September. The spread has not been an even one. As regular testing and reporting of swine flu stopped after September 2009, subsequent spread cannot be plotted in time and space. These maps were constructed from data obtained from Centre for Health Protection, Hong Kong Government Department of Health.