Obesity vaccine?  October 19, 2005 - 7:03AM  When babies receive
shots against diseases like polio and measles, their
vaccinations may in the future include protection against
getting fat, according to researchers.  Infection by certain
pathogens triggers rapid increases in fatty tissue in animals,
Nikhil Dhurnadha told the annual meeting of NAASO, the Obesity
Society, in the Canadian city of Vancouver.  At the same time,
the discovery that many more obese people than normal-weight
people have been exposed to a certain virus suggests a link
between obesity and viral infection.  "Not all obesity can be
explained by infection," said Dhurandhar, of the Pennington
Biomedial Research Centre at Louisiana State University in Baton
Rouge.  "Infections can be one of the causes."  Popular opinion
has long held that most obesity is caused simply by overeating,
underexercise and a lack of will power. But viruses are just one
of many contributing factors that scientists have recently
discovered.  Researchers are reporting