The map of flu activity across the United States continues to darken, both figuratively and literally, as case numbers spike upward in most states, according to the Centers for Disease Control and ...

Flu numbers across Oklahoma are considered "high risk," as the positivity rate has increased across the state over the past ...

The map of flu activity across the United States continues to darken, both figuratively and literally, as case numbers spike ...

The map of flu activity across the United States continues to darken, both figuratively and literally, as case numbers spike ...

The map of flu activity across the United States continues to darken, both figuratively and literally, as case numbers spike ...

The map of flu activity across the United States continues to darken, both figuratively and literally, as case numbers spike upward in most states, according to the Centers for Disease Control and ...

The map of flu activity across the United States continues to darken, both figuratively and literally, as case numbers spike ...

SAN FRANCISCO -- The CDC has confirmed the positive bird flu case in a child in San Francisco. City health officials first reported on a presumptive case in a child on Jan. 10 and continue to ...

Only one flu strain — influenza A — is known to cause global epidemics of disease, the CDC said “Pandemics can happen when a different and new influenza A virus infects people and spreads ...