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Alzheimer's disease affects only about 10% of people older than 65 years of age. Most forms of decreased mental function and dementia are caused by disuse (letting the mind get lazy).
In 2012, nearly 24 milliion Americans, aged 12 and older, had abused an illicit drug, according to the National Institute on Drug Abuse (NIDA).
The first monoclonal antibodies were made exclusively from mouse cells. Some are now fully human, which means they are likely to be safer and may be more effective than older monoclonal antibodies.
Addicts to opiates often avoid treatment because they are afraid of withdrawal. Though unpleasant, with proper management, withdrawal is rarely fatal and passes relatively quickly.
The average human gut is home to perhaps 500 to 1,000 different species of bacteria.
![Skull of an Oriental giant squirrel (genus Ratufa) - note the classic sciuromorphous shape of the an](https://biology-forums.com/gallery/47/medium_27692_23_04_12_3_36_52.jpeg)
![Sickle cell anemia. The clinical manifestations of sickle cell anemia result from pathologic changes](https://biology-forums.com/gallery/47/medium_14755_01_10_12_7_58_57_9218989.jpeg)