Core exercises
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.
COVID-19 travel advice
Concerned about COVID-19 when you travel? Follow these tips for safely flying, driving and staying at hotels.
Balance exercises
These exercises can improve balance and help prevent falls. See how they're done.
Guide to different tick species and the diseases they carry
Learn about different tick species and some of the diseases they may carry.
10 great health foods
Add these health foods to the menu and give your diet a healthy boost.
Breastfeeding positions
Breastfeeding can be awkward at first. Experiment with various positions until you feel comfortable.
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