Fitness basics
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.
Children and gender identity: Supporting your child
Learn how to talk to children about their internal sense of gender. Also find out how to support their gender expression and advocate for them.
Healthy sperm: Improving your fertility
You can take simple steps to have healthy sperm and improve your fertility.
COVID-19, cold, allergies and the flu: What are the differences?
Knowing if you have COVID-19, a cold, the flu or seasonal allergies isn't easy. Find out about the differences between these illnesses.
Bladder control: Medications for urinary problems
If you've tried lifestyle changes and you still have bladder control problems, medication might help.
Erectile dysfunction: Viagra and other oral medications
Get the facts on medicines that are taken by mouth for ED.
COVID-19 vaccines: Get the facts
Find out about the COVID-19 vaccines, the benefits of COVID-19 vaccination and the possible side effects.
Asthma inhalers: Which one's right for you?
With so many options, choosing an asthma inhaler can be confusing. Use this helpful guide to find the one that works best for you.
Puberty blockers for transgender and gender-diverse youth
Understand how puberty blockers work to suppress puberty. Learn about their benefits, side effects and long-term effects.
Erectile dysfunction: Nonoral treatments
Get the facts about shots, penis pumps and other ED treatments that don't involve taking medicine by mouth.
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