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Cancer has been around as long as humankind, but only in the second half of the twentieth century did the number of cancer cases explode.
In the United States, an estimated 50 million unnecessary antibiotics are prescribed for viral respiratory infections.
To prove that stomach ulcers were caused by bacteria and not by stress, a researcher consumed an entire laboratory beaker full of bacterial culture. After this, he did indeed develop stomach ulcers, and won the Nobel Prize for his discovery.
Stevens-Johnson syndrome and Toxic Epidermal Necrolysis syndrome are life-threatening reactions that can result in death. Complications include permanent blindness, dry-eye syndrome, lung damage, photophobia, asthma, chronic obstructive pulmonary disease, permanent loss of nail beds, scarring of mucous membranes, arthritis, and chronic fatigue syndrome. Many patients' pores scar shut, causing them to retain heat.
The most destructive flu epidemic of all times in recorded history occurred in 1918, with approximately 20 million deaths worldwide.
![Otitis media. This illustration shows an inflamed tympanic cavity, which is the most common source o](https://biology-forums.com/gallery/47/medium_14755_14_10_12_6_37_46_94012321.jpeg)
![Lumbar puncture. Abbreviated LP, the lumbar puncture is a common procedure that withdraws cerebrospi](https://biology-forums.com/gallery/47/medium_14755_14_10_12_6_49_35_94142278.jpeg)
![Blue light is scattered more than other wavelengths by the gases in the atmosphere, giving the Earth](https://biology-forums.com/gallery/47/medium_12359_13_01_13_5_58_05.jpeg)