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Did you know?
More than 50% of American adults have oral herpes, which is commonly known as "cold sores" or "fever blisters." The herpes virus can be active on the skin surface without showing any signs or causing any symptoms.
Did you know?
Asthma is the most common chronic childhood disease in the world. Most children who develop asthma have symptoms before they are 5 years old.
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The familiar sounds of your heart are made by the heart's valves as they open and close.
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On average, the stomach produces 2 L of hydrochloric acid per day.
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Individuals are never “cured” of addictions. Instead, they learn how to manage their disease to lead healthy, balanced lives.
![A gauge reading with the needle fluctuating 3 to 9 inches Hg below normal often indicates a vacuum ...](https://biology-forums.com/gallery/29/medium_548020_30_05_17_4_15_51_296852374.png)
![A needle that drops to near zero when the engine is accelerated rapidly and then rises slightly to ...](https://biology-forums.com/gallery/29/medium_548020_30_05_17_4_21_49_296931436.png)