The US is ramping up bird flu surveillance – but will it be enough?

Two more people in the US have tested positive for a bird flu virus called H5N1, highlighting the need for expanded influenza surveillance to prevent a potential pandemic

​Two more people in the US have tested positive for a bird flu virus called H5N1, highlighting the need for expanded influenza surveillance to prevent a potential pandemic Two more people in the US have tested positive for a bird flu virus called H5N1, highlighting the need for expanded influenza surveillance to prevent a potential pandemic