# 4568
The World Health Organization released an updated map today showing the locations around the world where laboratory confirmed cases of H5N1 has been detected in humans.
Although it is entirely likely that some human infections have escaped detection, the few seroprevalence studies conducted in H5N1 hot-zone countries indicate that the virus remains difficult to catch, and only rarely has it been demonstrated to have been transmitted from one person to another.
That could change at any time, of course, if the virus should mutate into a more human adapted form.
By clicking this link, or the image below, you’ll get an enlarged PDF version to view. A PNG format graphic may be accessed HERE.
The second graphic (click to enlarge) has the WHO’s count of cases by country & year since 2003, updated as of May 6th.
