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Complications of influenza include: bacterial pneumonia, ear and sinus infections, dehydration, and worsening of chronic conditions such as asthma, congestive heart failure, or diabetes.
Cocaine was isolated in 1860 and first used as a local anesthetic in 1884. Its first clinical use was by Sigmund Freud to wean a patient from morphine addiction. The fictional character Sherlock Holmes was supposed to be addicted to cocaine by injection.
In 1844, Charles Goodyear obtained the first patent for a rubber condom.
Calcitonin is a naturally occurring hormone. In women who are at least 5 years beyond menopause, it slows bone loss and increases spinal bone density.
There used to be a metric calendar, as well as metric clocks. The metric calendar, or "French Republican Calendar" divided the year into 12 months, but each month was divided into three 10-day weeks. Each day had 10 decimal hours. Each hour had 100 decimal minutes. Due to lack of popularity, the metric clocks and calendars were ended in 1795, three years after they had been first marketed.
![Illustration of an embolus floating in an artery. The embolus will become lodged in a blood vessel t](https://biology-forums.com/gallery/47/medium_14755_10_09_12_7_23_54_85261086.jpeg)
![A freshly applied autograft. Note that the donor skin has been perforated so that it can be stretche](https://biology-forums.com/gallery/47/medium_14755_16_09_12_6_01_25_8780531.jpeg)