Health and Human Services Secretary Robert F. Kennedy Jr. warned earlier this year that vaccinating poultry against highly pathogenic avian influenza A (H5) viruses might transform farms into incubators for mutant viruses — viruses that could potentially leap to humans.
"All of my agencies have advised against the vaccination of birds," Kennedy told Fox News' Sean Hannity, "because if you vaccinate with a leaky vaccine — in other words, a vaccine that does not provide sterilizing immunity, that does not absolutely protect against the disease — you turn those flocks into mutation factories."
"They're teaching the organism how to mutate," continued Kennedy. "And it's much more likely to jump to animals if you do that."