From Beijing to Hong Kong, Tracking H7N9's Spread
The H7N9 virus is the newest strain of avian influenza to infect humans. New cases of the infection have surged in recent weeks after a temporary slowdown in 2013. The Chinese government has restricted live poultry sales and quarantined farms in cities with the most H7N9 infections.
Graphic Updated Jan. 27, 2014
New Infections Surge as Winter Sets In
Through June 11, 132 cases of H7N9, including 39 deaths, have been confirmed by the World Health Organization. Investigations into the cause are ongoing and there is no evidence of sustained person-to-person spread of the virus. Most of the infections have occurred in middle-aged or older men, according to WHO reports.
Laboratory-confirmed cases of A(H7N9) in humans,
by reported date of illness onset or death1
1 – Case information reflects World Health Organization information and may not represent total number of human infections or deaths. Figures after April 15 reflect changes to how the WHO reports prior infections and deaths. Flu cases and deaths are based on laboratory confirmation and often thought to significantly under-represent actual figures.
Sources: World Health Organization, U.S. Centers for Disease Control and Prevention, British Medical Journal 2009;393:b5213
Graphic: David Ingold & Chloe Whiteaker / BLOOMBERG VISUAL DATA