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Pink eye is a term that refers to conjunctivitis, which is inflammation of the thin, clear membrane (conjunctiva) over the white part of the eye (sclera). It may be triggered by a virus, bacteria, or foreign body in the eye. Antibiotic eye drops alleviate bacterial conjunctivitis, and antihistamine allergy pills or eye drops help control allergic conjunctivitis symptoms.
There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
In 1844, Charles Goodyear obtained the first patent for a rubber condom.
In most cases, kidneys can recover from almost complete loss of function, such as in acute kidney (renal) failure.
Since 1988, the CDC has reported a 99% reduction in bacterial meningitis caused by Haemophilus influenzae, due to the introduction of the vaccine against it.