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Malaria was not eliminated in the United States until 1951. The term eliminated means that no new cases arise in a country for 3 years.
Thyroid conditions cause a higher risk of fibromyalgia and chronic fatigue syndrome.
In 1835 it was discovered that a disease of silkworms known as muscardine could be transferred from one silkworm to another, and was caused by a fungus.
The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
It is believed that the Incas used anesthesia. Evidence supports the theory that shamans chewed cocoa leaves and drilled holes into the heads of patients (letting evil spirits escape), spitting into the wounds they made. The mixture of cocaine, saliva, and resin numbed the site enough to allow hours of drilling.
![Examples of pessaries. (A) Various shapes and sizes of pessaries available. (B) Insertion of one typ](https://biology-forums.com/gallery/47/medium_33_05_05_11_8_22_07.jpeg)
![Ashurnasirpal II Killing Lions, from the palace complex of Ashurnasirpal II, Kalhu (modern Nimrud, ...](https://biology-forums.com/gallery/47/medium_667187_21_02_17_12_54_47_25459478.jpeg)