Researchers: H1N1 virus could be mutating

October 21, 2010

More study is needed to tell whether the new strain is more likely to kill patients and whether the current vaccine can protect against it completely.

But Researchers are stressing that flu vaccines mutate constantly. This is why people need a new flu vaccine every year.

Also, scientists all around the world keep an eye on all flu strains in case an especially dangerous new mutant emerges.

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