The H7N9 bird flu virus can be transmitted not only through close contact but by airborne exposure, a team at the University of Hong Kong found after extensive laboratory experiments.
Though the virus appears to have been brought under control recently, the researchers urged the Hong Kong authorities to maintain strict surveillance, which should include not only poultry but humans and pigs.
In the study, to be published today in the journal Science, ferrets were used to evaluate the infectivity of H7N9. It was found the virus could spread through the air, from one cage to another, albeit less efficiently.
Inoculated ferrets were infected before the appearance of most clinical symptoms. This means there may be more cases than have been detected or reported.
“People may be transmitting the virus before they even know that they’ve got it,” Zhu said. SCMP via Zero Hedge