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Looking at the sun may not only cause headache and distort your vision temporarily, but it can also cause permanent eye damage. Any exposure to sunlight adds to the cumulative effects of ultraviolet (UV) radiation on your eyes. UV exposure has been linked to eye disorders such as macular degeneration, solar retinitis, and corneal dystrophies.
It is believed that humans initially contracted crabs from gorillas about 3 million years ago from either sleeping in gorilla nests or eating the apes.
HIV testing reach is still limited. An estimated 40% of people with HIV (more than 14 million) remain undiagnosed and do not know their infection status.
About 3.2 billion people, nearly half the world population, are at risk for malaria. In 2015, there are about 214 million malaria cases and an estimated 438,000 malaria deaths.
Barbituric acid, the base material of barbiturates, was first synthesized in 1863 by Adolph von Bayer. His company later went on to synthesize aspirin for the first time, and Bayer aspirin is still a popular brand today.
![Young boy with characteristic nasal crease from the repeated action of the “nasal salute” caused ...](https://biology-forums.com/gallery/47/medium_2137_18_05_12_3_17_20.jpeg)
![Conjunctivitis, with the characteristic “pinkeye” appearance. A yellow crusty exudate is also common](https://biology-forums.com/gallery/47/medium_14755_14_10_12_6_36_55_93941824.jpeg)