CDC: 2 children sickened by novel swine flu strain     
A new strain of swine  flu has shown up in two children in Pennsylvania and Indiana who had  direct or indirect contact with pigs. The virus includes a gene from the  2009 pandemic strain that might let it spread more easily than pig  viruses normally do.
So far, there's no sign  that the virus has spread beyond the two children, the Centers for  Disease Control and Prevention reported Friday.
"We  wanted to provide some information without being alarmist," because  people have contact with pigs at fairs this time of year and doctors  should watch for possible flu cases, said Lyn Finelli, the CDC's flu  surveillance chief.  "We're always concerned when we see transmission of  animal viruses to humans."
