Lindsey Tanner, Associated Press

The coolest thing on social media these days may be celebrities and regular folks plunging into frigid water or taking ice baths.

The Centers for Disease Control and Prevention urged all pregnant women Wednesday to get the COVID-19 vaccine as hospitals in hot spots around the U.S. see disturbing numbers of unvaccinated mothers-to-be seriously ill with the virus.

The U.S. has seen a string of COVID-19 infections tied to summer camps in recent weeks. Some fear it could be a preview of the upcoming school year.

Health authorities are trying to determine whether heart inflammation that can occur along with many types of infections could also be a rare side effect in teens and young adults after the second dose of COVID-19 vaccine.

In addition to psychological distress, some studies suggest loneliness may cause physical changes including inflammation and elevated stress hormones that may tighten blood vessels and increase blood pressure.

The coronavirus is increasingly infecting American children and teens in a trend authorities say appears fueled by school reopenings and the resumption of sports, playdates and other activities.

In the latest study to suggest an uptick, half of U.S. adults surveyed reported at least some signs of depression.

Acupuncture gets a thumbs-up for helping relieve pain from chronic headaches, backaches and arthritis in a review of more than two dozen studies -- the latest analysis of an often-studied therapy that has as many fans as critics.

Laws strictly curbing school sales of junk food and sweetened drinks may play a role in slowing childhood obesity, according to a study that seems to offer the first evidence such efforts could pay off.