Alternative medicine
Learning Center
How to measure your respiratory rate
Learn how to accurately measure your breathing rate, which is also known as your respiratory rate.
How to take your pulse
Learn two ways to take an accurate pulse, or heart rate.
How well do face masks protect against COVID-19?
Face masks can help slow the spread of coronavirus disease 2019 (COVID-19). Learn about mask types, which masks to use and how to use them.
Debunking COVID-19 myths
Some information you come across about COVID-19 may be out of date or false. Learn about COVID-19 myths so you can bust them when you see them.
COVID-19 vaccines for kids: What you need to know
Learn about the safety and effectiveness of COVID-19 vaccines for kids, the possible side effects, and the benefits of vaccination.
Sun damage
See photos of common skin conditions that are caused by too much time in the sun.
How you hear
Your ears enable you to gather and interpret sounds from the world around you.
Joint protection for people with hand arthritis
Joint protection — photos showing joint protection techniques to avoid hand arthritis pain.
Which CPAP masks are best for you?
CPAP masks come in a variety of styles. See some of your options.
How your brain works
Which part of your brain does what? Take a tour.
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