Second trimester
Learning Center
Guide to different tick species and the diseases they carry
Learn about different tick species and some of the diseases they may carry.
HPV vaccine: Who needs it, how it works
Learn about how the HPV vaccine works, who needs it and what side effects to expect.
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.
Herbal supplements and heart medicines may not mix
Some herbal supplements can have dangerous interactions with heart medications.
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.
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.
How you hear
Your ears enable you to gather and interpret sounds from the world around you.
Iron deficiency in children: Prevention tips for parents
Learn how much of this key mineral your child needs and what the health risks of not getting enough are.
Kratom for opioid withdrawal: Does it work?
Kratom is promoted as an aid in overcoming withdrawal from opioid medications, but research suggests that it leads to more health problems than it solves.
Kratom: Unsafe and ineffective
Users claim kratom lifts mood and boosts energy, but there are many safety issues and questions about whether it works. Learn more before trying it.
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