Bird Flu Fears
From the AP:
Scientists say they’ve found a reason bird flu isn’t spreading easily from person to person: The virus concentrates itself too deep in the respiratory tract to be spewed out by coughing and sneezing.
But the virus could change that behavior by genetic mutation, taking a step toward unleashing a worldwide outbreak of lethal flu.
Experts said the new finding doesn’t indicate how likely such a pandemic is. The virus may also need other mutations to take off in the human population, they said. Still, the work suggests a particular sign to watch for in new virus samples to help gauge the danger to humans.