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MedlinePlus is a service of the National Library of Medicine (NLM), the world's largest medical library, which is part of the National Institutes of Health (NIH). It was built as an online health information resource for patients and their families and friends.

MedlinePlus presents high-quality, easy to understand, relevant health and wellness information that is trusted.

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Flu - National Library of Medicine

What is the flu? The flu, also called influenza, is a respiratory infection caused by viruses. Each year, millions of Americans get sick with the flu. ...

HPV - National Library of Medicine

What is HPV? Human papillomavirus (HPV) is a group of more than 200 related viruses. Some of them are spread through sexual contact. Most people have been ...

Malaria - National Library of Medicine

Malaria is a serious disease caused by a parasite. You get it when an infected mosquito bites you. Malaria is a major cause of death worldwide, but it is almost ...



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