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Overall, this season's vaccine is about 36 percent effective in blunting or preventing flu, health officials say. That's better than earlier predictions, and good enough to prevent flu in thousands.

A report from the surgeon general warns that "nicotine is addictive and harmful for youth and young adults," and notes e-cigarettes are increasingly popular among people under 25.

At least 13 countries have sent money, equipment and people to help fight wildfires that have killed at least 11 people, including four firefighters.

One inauguration protest erupted into conflict; officers in riot gear sent a concussive device into the crowd of several hundred. The interim police chief says protests elsewhere have been peaceful.

Neither getting the flu nor getting a flu shot appears to increase the risk of autism in children, a study finds. The shots are recommended because the flu poses health risks to mother and fetus.

Brazil's National Institute for Space Research found that more than 3,000 square miles of forest cover were lost between August 2015 and July 2016 — a substantial increase over the year before.

In response to an NPR investigation that shows 10 times the number of cases as currently reported, members of Congress are asking three federal agencies to work together to obtain an accurate count.

Barris died of natural causes Tuesday at his home in Palisades, N.Y., according to publicist Paul Shefrin. Critics called Barris "The King of Schlock" or "The Baron of Bad Taste."

On Friday, a supply rocket is scheduled to send an inflatable module to the International Space Station. The expandable technology is being developed by a private firm.

Bassist and Jazz Night In America host Christian McBride spotlights a vocalist from France, a drummer from Mexico and a trumpet-playing South African legend.