FRIDAY, May 13 (HealthDay News) -- School lunches have long served as the punch line of jokes, prompting chuckles about "mystery meat" and angry lunch ladies.

FRIDAY, May 13 (HealthDay News) -- Every day, Carol Chong oversees the serving of about 300,000 meals to hungry students in the fourth-largest school district in the United States.

(HealthDay News) -- Anxiety can quickly spiral out of control and interfere with daily life.

(HealthDay News) -- The immune system helps your body fight off germs, protecting you from getting sick.

FRIDAY, May 13 (HealthDay News) -- Being well-informed about their disease may lead to depression in women with heart failure who repress their anger and other emotions about their condition, according to new research.

FRIDAY, May 13 (HealthDay News) -- Like all good pet owners, Christine Wong didn't hesitate to go to a veterinary clinic near her home in Austin, Texas, when her cat, Kiki, wasn't feeling well.

FRIDAY, May 13 (HealthDay News) -- Many white teen girls and young women in the United States who use indoor tanning beds have mothers who also use tanning beds, a survey finds.

FRIDAY, May 13 (HealthDay News) -- Teenagers who drink are more likely to spend extra hours at their computers for activities not related to their schoolwork, a new study shows.

FRIDAY, May 13 (HealthDay News) -- Doctors rely on a patient's knowledge of his or her family medical history in assessing cancer risk, but these recollections are not always dependable.

FRIDAY, May 13 (HealthDay News) -- Chest compressions during chiropractic spinal manipulation result in little or no risk of chest injury, according to new research.

FRIDAY, May 13 (HealthDay News) -- A program to boost heart health in students at a middle school in Michigan was so successful that it's being expanded to about 20 middle schools in the state, researchers say.

FRIDAY, May 13 (HealthDay News) -- Caring for a loved one who is ill is always stressful, but older people caring for a spouse who has dementia may face an increased risk for cognitive problem or dementia themselves, researchers report.

FRIDAY, May 13 (HealthDay News) -- A common gene variant among black people may be linked to the development of life-threatening heart arrhythmias (when the heart beats too fast, too slow or irregularly), according to a new study.

FRIDAY, May 13 (HealthDay News) -- People who cut their daily caloric intake by 25 percent or more may live longer than those who do not, a new study suggests.

THURSDAY, May 12 (HealthDay News) -- Representatives for veteran TV sitcom star Mary Tyler Moore report that she entered a facility for surgery to remove a meningioma -- a type of tumor, usually benign, that can occur on the meninges, the brain's protective outer membrane.

FRIDAY, May 13 (HealthDay News) -- Learning to play a musical instrument has many well-known advantages, but sharing wind instruments can spread disease-causing bacteria and other germs, researchers warn.

Here are some of the latest health and medical news developments, compiled by the editors of HealthDay:

FRIDAY, May 13 (HealthDay News) -- The U.S. Food and Drug Administration late Friday gave approval to Victrelis (boceprevir), one of a new class of drugs aimed at fighting chronic hepatitis C infection.