Studies

Study of 3.5 million people finds that human hormones change with the seasons

NC State Board of Education approves new standards for social studies :: WRAL.com

Russia’s vaccine is safe and effective, published studies show

People who have had COVID-19 may need only one injection, new studies show

CDC studies the effectiveness of the double mask against the spread of coronavirus

Why the UK variant of SARS-CoV-2 can be more deadly

Study with more than 2,000 people links naps in the afternoon with better mental alertness

Joe Biden aims at daily vaccine doses of 1.5 million; Minnesota reports the first American case of variant from Brazil; CDC studies NFL players

In Philadelphia, opioid overdoses are killing more black, but less white residents, according to a Penn study

Studies of South African coronavirus strains raise concerns about immune response

New studies clarify which genes can increase the risk of breast cancer

Mobile labs take vaccine studies to different neighborhoods