Teen health
Learning Center
Herd immunity and COVID-19: What you need to know
To protect groups of people over time, it helps to know what level of recovery or vaccination in a population makes it hard for a germ to spread.
Helping baby sleep through the night
Help your baby sleep through the night.
Heart attack prevention: Should I avoid secondhand smoke?
It's possible that secondhand smoke can irritate the arteries and increase the risk of a heart attack.
Health issues for lesbians and other women who have sex with women
Understand health concerns for lesbians and other women who have sex with women, and take steps to promote good health.
Health issues for gay men and other men who have sex with men
Understand health concerns for gay men and other men who have sex with men, and learn how to promote good health.
Hand-washing: Do's and don'ts
Done properly, hand-washing is a simple way to prevent the spread of germs and avoid getting sick.
HPV vaccine: Who needs it, how it works
Learn about how the HPV vaccine works, who needs it and what side effects to expect.
Green stool
Learn about the possible causes of green stools in adults and infants.
Genetic testing for breast cancer: Psychological and social impact
Prepare for your hereditary cancer gene test by learning how genetic testing for breast cancer may affect you and your family members.
Frostbite
Learn how to prevent cold injury to the skin when outdoors in freezing temperatures and how to treat and recover from frostbite.
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