Changing patterns of cases of avian (H5N1) influenza in northern Vietnam
this year suggest the virus is mutating in ways that may render it more infectious
for humans and perhaps more likely to spread from person to person, according
to a new report from the WHO (http://www.who.int/csr/disease/avian_influenza/en/).
The epidemiological observations and sequencing analyses of genes from
avian and human H5N1 viruses “demonstrate that the viruses are continuing
to evolve and pose a continuing and potentially growing pandemic threat,”
the report notes.
Stephenson J. Avian Flu Concerns. JAMA. 2005;293(23):2850. doi:10.1001/jama.293.23.2850-b