CNN Health

In the quest for improved and universal vaccines, scientists turned to a mutant virus to build an experimental flu vaccine. So far, the vaccine only has been studied in mice and ferrets.

As a deadly flu season continues to ravage the United States, scientists are scrambling to find new ways to fight the virus, including building vaccines that offer stronger protection against the most aggressive flu strains and last longer than just one season.

What you eat in the morning can affect how much you consume the rest of the day. Nutritionist Lisa Drayer breaks down your best bets for breakfast.

There is hope that the #MeToo conversation on sexual harassment will halt the decline in confidence that young girls experience in middle and high school.

There is hope that the #MeToo conversation on sexual harassment will halt the decline in confidence that young girls experience in middle and high school.

Finding a cure for neurodegenerative diseases such as Alzheimer's is challenging. They're difficult to diagnose, and drugs struggle to get into the brain as the brain's blood supply is largely separate to the rest of the body.

Finding a cure for neurodegenerative diseases such as Alzheimer's is challenging. They're difficult to diagnose, and drugs struggle to get into the brain as the brain's blood supply is largely separate to the rest of the body.

Like most men of his age, President Donald Trump has a common form of heart disease, relatively easy to address if he increases the dose of his cholesterol-lowering medication and makes necessary lifestyle changes. Without those changes, the President has a moderate risk of having a heart attack in the next three to five years, according to the Mayo Clinic.

President Donald Trump's doctor, Dr. Ronny Jackson, characterized the president's health as "excellent," but like the majority of Americans, Trump is overweight and he doesn't get enough exercise.

For teens, using either marijuana or cigarettes is associated with higher odds of psychotic-like experiences, a new study published Wednesday in the journal JAMA Psychiatry found. Psychosis describes the mental condition of losing touch with reality, such as experiencing hallucinations or delusions.

For teens, using either marijuana or cigarettes is associated with higher odds of psychotic-like experiences, a new study published Wednesday in the journal JAMA Psychiatry found. Psychosis describes the mental condition of losing touch with reality, such as experiencing hallucinations or delusions.

Before Hurricane Maria made landfall in Puerto Rico on September 30, the United States had already experienced intermittent shortages of IV bags, which are used to administer and dilute medications. The devastation caused by the Category 4 hurricane -- the first to hit the island in more than eight decades -- amplified the IV bag shortage, in particular sodium chloride 0.9% injection bags, which are ubiquitous in medical facilities and hospitals.

It used to be that washing your kid's mouth out with soap was seen as a punishment. Now, authorities are trying to keep teens from doing just that.

It used to be that washing your kid's mouth out with soap was seen as a punishment. Now, authorities are trying to keep teens from doing just that.

UK Prime Minister Theresa May has appointed a minister for loneliness in a drive to tackle social isolation, a problem endured by 9 million Britons.

UK Prime Minister Theresa May has appointed a minister for loneliness in a drive to tackle social isolation, a problem endured by 9 million Britons.

After thousands of customers' HIV statuses were revealed in mailings last year, a federal class-action lawsuit against health care company Aetna has reached a $17 million settlement.

After thousands of customers' HIV statuses were revealed in mailings last year, a federal class-action lawsuit against health care company Aetna has reached a $17 million settlement.