Browning and colleagues have now sequenced the new viruses and found that in each case they arose when
the European vaccine strain acquired genes from the Australian vaccine viruses.
Not exact matches
Four
European countries have ordered a
vaccine tailor - made for the new H1N1 influenza
strain by GlaxoSmithKline.
Then they began using a third live
vaccine containing a
European strain.
They then began using a third live
vaccine containing a
European strain.