November 26, 2011 by staff 

CDC CONFIRMS NEW SWINE FLU STRAIN, The Centers for Disease Control and Prevention has confirmed three cases of a new flu virus, which originated in pigs but apparently spread from person to person, in three Iowa children.
However, there’s no reason to fear the beginning of a new pandemic, says Arnold Monto, a flu expert and professor at the University of Michigan School of Public Health.

“I don’t think this is anything to worry about for the moment,” Monto says. “We have known that swine viruses get into humans occasionally, transmit for a generation or two and then stop. The issue is whether there will be sustained transmission (from person to person)- and that nearly never happens.”

The CDC has counted a total of 18 cases of this new virus, an influenza A strain known as S-OtrH3N2, in two years. That suggests that it’s not spreading quickly or easily, says William Schaffner, a professor at the Vanderbilt University School of Medicine and spokesman for the Infectious Diseases Society of America.

Schaffner notes that flu viruses mutate and swap genes all the time. Infectious disease experts may only be noticing these new viruses because of better technology, he says. The USA’s beefed-up state medical labs, which have lots more firepower than before 2001, are much better at spotting novel viruses, which in the past might have gone unnoticed.

Thanks to the sophistication of these labs, scientists are getting a window into the inner workings of the flu that they haven’t had in the past, Schaffner says. But that doesn’t mean that these novel viruses are necessarily any more dangerous.

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