Flu shots

• US flu activity fell for a second week. But experts worry the season is far from over - The U.S. flu season appears to be waning with two straight weeks of decline in measures of flu activity, according to the latest government data released Friday. The Centers for Disease Control and Prevention posted data — for flu activity
• Flu activity is increasing sharply across the US - Most US states are experiencing high or very high flu activity, and levels continue to increase nationwide.
• Flu season is ramping up, and some experts are "pretty worried" - Doctors and scientists say this year's influenza season could be tougher than usual, with a new version of the flu virus, called H3N2, spreading quickly.