CHICAGO — Tests of lung samples taken from 29 patients with vaping-related lung injuries suggest all contained Vitamin E acetate, a discovery U.S. officials described as a “breakthrough” in the investigation of the nationwide outbreak that topped 2,000 cases this week.

Dear Mayo Clinic: For the past few weeks, my 13-year-old daughter has had trouble falling asleep at night. She’s in bed at a reasonable time, but can’t seem to fall asleep until after midnight. What could cause insomnia in someone so young? Should I make an appointment for her see her doctor?

Women who go through menopause earlier in life may be more likely to have a heart attack or stroke before they reach age 60 than their counterparts who go through menopause later on, a recent study suggests.

CHICAGO — U.S. health officials this week reported another 180 cases of vaping-related lung illnesses and announced plans to start testing aerosols produced by e-cigarettes and vaping products as they search for the source of the nationwide outbreak that has so far killed at least 33 people …

Low-risk pregnant women who deliver in a hospital and receive care from midwives have fewer interventions and fewer cesarean sections than similar women who receive care from obstetricians, a U.S. study finds.

People with a positive outlook on life may be less likely than pessimists to experience events like a heart attack or stroke, and they may live longer, a recent review of existing research suggests.

For parents and caregivers, it can be hard to tell whether your child’s illness requires antibiotics or if there are other ways to effectively treat his or her symptoms. To prevent overuse of these drugs, it’s important to know when home remedies can be used instead of antibiotics.

OLYMPIA — Gov. Jay Inslee on Friday urged state agencies to ban flavored and cannabis-derived vaping products, joining other states and the federal government in taking steps to reduce vaping amid a mysterious outbreak of deaths and illness.

People who are overweight or obese may get more physical activity when they participate in step-counting contests than when they simply use activity trackers to monitor their own steps, a recent experiment suggests.

NEW YORK — A growing number of Americans say that vaping e-cigarettes is at least as harmful as smoking traditional cigarettes, according to a Reuters/Ipsos poll, following reports of an outbreak of vaping-related illnesses and deaths.

WASHINGTON, D.C. — U.S. House Speaker Nancy Pelosi, a Democrat, proposed legislation on Thursday to let the federal government negotiate lower prices for costly prescription drugs, drawing praise from President Donald Trump, who urged a bipartisan solution.

As if migraines didn’t already cause enough suffering, a new study has found that people who experience the debilitating headaches are at much higher risk for Alzheimer’s disease.

Is your teen at risk of suicide? While no teen is immune, there are factors that can make some adolescents more vulnerable than others. Understand how to tell if your teen might be suicidal and where to turn for help and treatment.

TOPEKA, Kan. — A Kansas resident was the sixth person to die in the United States of a mysterious respiratory illness related to vaping, state officials said on Tuesday, as public health officials scrambled to understand a nationwide health problem.

People who get even a small amount of exercise may be less likely to die prematurely than their more sedentary counterparts, a research review suggests.

While Washington gets a lot of attention for being a millennial magnet, it’s also a great place to grow old, according to a new study from Senior Living, which found that our state has the eighth-highest life expectancy in the nation. Washington residents can expect to live an average of 80.…

There was a time when the boundaries between work and home were fairly clear. Today, however, work is likely to invade your personal life — and maintaining work-life balance is no simple task. When your work life and personal life are out of balance, your stress level is likely to soar.

TORONTO — The Canadian government on Friday announced final regulations to reduce patented drug prices it said would save Canadians $10 billion over a decade, overriding heavy opposition from pharmaceutical companies.

Good news for women who can’t quite bring themselves to go vegetarian, but don’t mind giving up burgers and steaks: A new study finds red meat may increase breast cancer risk, while substituting poultry may lower it.