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It takes time after vaccination for immunity to the virus to build up, and no vaccine is 100% effective. Plus, scientists don't yet know if the vaccine stops viral spread. Here's what's known so far.

Even as pollution emissions declined from other sources including vehicle exhaust and power plants, the amount from fires increased sharply, said researchers at Stanford University and the University of California, San Diego.

Stream now or tune in Tuesday, Jan. 12, 2021 at 10 p.m. on KPBS TV

NPR's Scott Simon reflects on the life and work of famed reporter Neil Sheehan who obtained the Pentagon Papers. Sheehan died this week at the age of 84.

Some rural areas, where health care is usually harder to get, appear to be leading the nation in delivery of the COVID-19 vaccine. But health leaders are cautioning there are caveats.

Some rural areas, where health care is usually harder to get, appear to be leading the nation in delivery of the COVID-19 vaccine. But health leaders are cautioning there are caveats.

From France to Germany to The Netherlands, citizens are venting frustration over the pace of the mass vaccination program.

The Latest on the Capitol riot and the aftermath

Wednesday's count is set to highlight the bitter divide between the parties. Debate will prolong the process but not change the election outcome. Here's what to expect and how to follow updates.

San Diego County public health officials Tuesday reported 1,814 new COVID-19 infections 56 deaths and a record number of hospitalizations.