The vaccine for H1N1 flu (swine flu) will be available in the fall of 2009. This vaccine is separate from the usual seasonal flu vaccine. Pregnant women are first on the list of those who ...
All four flu pandemics — in 1918, 1957 and 1968 and the swineflu pandemic of 2009 — were caused by Type A viruses. Influenza B viruses, however, only circulate in humans. They are divided ...