Cases of a new, less dangerous strain of swine flu reached triple digits this week, the CDC reported.
The newest strain of the H3N2 flu that spreads from pigs to people, called H3N2v, was confirmed to have infected 158 people this week, up from 29 last week, according to the Centers for Disease Control and Prevention.
Indications are that the new virus is much less dangerous than the 2009 strain that killed more than 12,000 worldwide, CDC officials said in a Thursday news call. For instance, only two of the new patients have even required brief hospitalizations. And most of the new flu cases appeared to have spread from pigs to humans, which indicates it is less contagious.