Vaccine makers prep bird flu shot for humans 'just in case'; rich nations lock in supplies

Some of the world's leading makers of flu vaccines say they could make hundreds of millions of bird flu shots for humans within months if a new strain of avian influenza ever jumps across the species divide. There has also been a push among companies to develop a bird flu vaccine for poultry, a market potentially far larger than that for humans. The agreements include six of the largest seasonal flu manufacturers, such as GSK, Sanofi and CSL Seqirus, the WHO said. There has also been a push among companies to develop a bird flu vaccine for poultry, a market potentially far larger than that for humans. The agreements include six of the largest seasonal flu manufacturers, such as GSK, Sanofi and CSL Seqirus, the WHO said.