“The days of medical masks at airports and widespread panic may be coming back—that’s because at least 12 humans are believed to have been infected with a new strain of swine flu that’s not covered by this season’s vaccine.

The new swine flu strain, H3N2v, has shown at least some potential for human-to-human transmission in those 12 individuals, which makes it especially dangerous. Between 2009 and mid-2010, more than 17,000 people died worldwide from the highly contagious H1N1 swine flu strain, leading the World Health Organization to call the strain a pandemic.”

(Source: 12 Infected With New Swine Flu Strain – US News and World Report.)