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Did you know?
Acute bronchitis is an inflammation of the breathing tubes (bronchi), which causes increased mucus production and other changes. It is usually caused by bacteria or viruses, can be serious in people who have pulmonary or cardiac diseases, and can lead to pneumonia.
Did you know?
The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
Did you know?
The average office desk has 400 times more bacteria on it than a toilet.
Did you know?
In 1864, the first barbiturate (barbituric acid) was synthesized.
Did you know?
The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.

