AS NUMBER OF INFECTIONS INCREASE, VIRUS MUTATIONS MULTIPLY

"New research shows the H5N1 avian flu virus multiplies several times as it's passed down through generations of people.

"Scientists studied a case in which at least seven members of one Indonesian family became infected. The research shows as the virus was passed through three generations of one family, it mutated. In one instance, 21 times.

"This is believed to be the first time H5N1 has spread through so many generations."