For years, health officials have warned outdoor lovers of the dangers of Lyme disease from tick bites. However, researchers are now sounding the alarm over the rise of a relatively obscure virus.

Add Yahoo as a preferred source to see more of our stories on Google. Is the United States prepared for an avian flu pandemic? Over the past few weeks, headlines about the avian flu have appeared in ...

Scientists are raising the alarm over a potential new pandemic virus that could be emerging in California. This week, ...

The agency said key questions remain unanswered.