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Researchers are trying to come up with tests that can be performed using a blood sample that will determine not only whether a COVID-19 vaccine will work but also for how long.

The 51-49 vote elevates Gupta to the No. 3 position inside the Justice Department, where she's expected to help shape the administration's efforts to reform policing.

Minneapolis Mayor Jacob Frey says his city is taking more steps to change policing following the murder conviction of Derek Chauvin in the death of George Floyd.

Judge Jeffrey Foster ordered law enforcement to disclose videos to Brown's family within 10 days but blocked public release until an investigation of the shooting is complete in 30 to 45 days.

Columbus, Ohio, authorities say officer Nicholas Reardon shot Ma'Khia Bryant, 16, after police were called to a neighborhood due to a reported disturbance.

Biologists say newly efficient and accurate gene sequencing techniques have allowed them to fairly quickly detail full genomes and find overlooked genes in a broad range of 25 important species.

Unless people are packed together, "there really just is not much spread happening outdoors," Dr. Ashish Jha of Brown University's School of Public Health says.

After referencing a history of discrimination he's experienced, West Chester Board of Trustees Chairman Lee Wong removed his shirt to show scars he got while he was in the military.

If you've spent any time around cats, you've seen them curl up in cozy spaces. A new study on feline cognition shows that they also like to sit in snug squares created by a kind of optical illusion.

An administration official says President Joe Biden has decided to stick with his Aug. 31 deadline for completing a U.S.-led evacuation of Americans and at-risk Afghans from the Kabul airport and for withdrawing the remaining U.S. forces.