No vaccine currently available for human infection with H7N9: WHO
To date, China has confirmed 14 H7N9 cases and five have died.
than 400 close contacts of the confirmed cases are being closely
monitored. Thus far, none of them have developed any symptoms of
illness, according to the WHO. "At this time there is no evidence of
ongoing human-to-human transmission," it said.
The WHO said it was yet to know the reason for the virus to infect
humans. However, analysis of the genes of these viruses suggested that
although they have evolved from avian viruses, they showed signs of
adaption to growth in mammalian species.
included an ability to bind to mammalian cells, and to grow at
temperatures close to the normal body temperature of mammals, which is
lower than that of birds, it said.