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As of mid-2016, 18.2 million people were receiving advanced retroviral therapy (ART) worldwide. This represents between 43–50% of the 34–39.8 million people living with HIV.
Adolescents often feel clumsy during puberty because during this time of development, their hands and feet grow faster than their arms and legs do. The body is therefore out of proportion. One out of five adolescents actually experiences growing pains during this period.
After 5 years of being diagnosed with rheumatoid arthritis, one every three patients will no longer be able to work.
A strange skin disease referred to as Morgellons has occurred in the southern United States and in California. Symptoms include slowly healing sores, joint pain, persistent fatigue, and a sensation of things crawling through the skin. Another symptom is strange-looking, threadlike extrusions coming out of the skin.
Human neurons are so small that they require a microscope in order to be seen. However, some neurons can be up to 3 feet long, such as those that extend from the spinal cord to the toes.
![A schematic of a typical glow plug circuit. Notice that the relay for the glow plug and intake air ...](https://biology-forums.com/gallery/29/medium_548020_25_05_17_1_22_50_29343451.png)
![The screen(s) protect the solenoid valve from dirt and debris that can cause the valve to stick. ...](https://biology-forums.com/gallery/29/medium_548020_30_05_17_3_43_26_296412081.png)