NewScientist (29 April 2015) (paywall) explains the shortcomings of current vaccines used to stop H5N2, which has decimated chickens in Iowa and turkeys in Minnesota:
[V]accinated poultry transmit the virus without getting sick, making its spread “silent”. Vaccination has driven H5N1’s evolution as these viruses adapt to the birds. China is now trapped, say researchers: it wants to give up expensive vaccination, but if it did, ubiquitous, silent H5N1 infections would decimate unvaccinated birds.
Must make farmers feel helpless. I hope they have insurance.
