Global Population Will Peak by Mid-Century, Shifting Economic Power

The world's population is shifting, with a new analysis predicting it will peak in 2064 at around 9.7 billion people and fall to 8.8 billion by the end of the century.

The United States will have population growth until just after mid-century (364 million in 2062). That will be followed by a moderate decline to 336 million by 2100. At ...

Moderna COVID-19 Vaccine 'Promising' After Early Trial

A leading COVID-19 vaccine contender has passed its early safety trial with flying colors.

The vaccine, created by Moderna, produced an immune response in all 45 healthy participants who received two shots 28 days apart, according to findings reported July 14 in the New England Journal of Medicine.

The vaccine (named m...

Obesity in Childhood Quickly Harms Heart Health

In a finding that suggests the seeds for heart disease are sown early in life, researchers report they found evidence of stiff, thickened arteries in children who had been obese as toddlers.

"Public health efforts are needed in the very early years to prevent problems with obesity and being overweight, to avoid the risk of adolescent ...

139 Clients, No COVID Infections: Hair Salon Study Shows Face Masks Work

While Americans continue to debate whether face masks can stop the spread of coronavirus, a new report offers compelling evidence that the coverings do indeed work.

In May, two hairstylists at a Missouri salon who had COVID-19 but wore face masks cut the hair of 139 masked customers for roughly a week, and did not infect a single clien...

What Jobs Are Toughest on the Knees?

Joint replacements for knee osteoarthritis are becoming more common, and now researchers have identified jobs that may lead to one.

Based on a review of 71 studies that included nearly one million workers, the riskiest occupations include agriculture, construction, mining, service jobs and housekeeping. And jobs that demand excessive ...

Tough Decisions as COVID-19 Causes Cancer Surgery Delays

Many cancer patients have faced delays to their health care during the coronavirus pandemic, but with what consequences?

Researchers at Beth Israel Deaconess Medical Center in Boston analyzed 15 years of data to determine how long surgery for certain types of cancer can be delayed without harming patients' chances of survival. The stud...