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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.
Increased intake of vitamin D has been shown to reduce fractures up to 25% in older people.
Between 1999 and 2012, American adults with high total cholesterol decreased from 18.3% to 12.9%
Blastomycosis is often misdiagnosed, resulting in tragic outcomes. It is caused by a fungus living in moist soil, in wooded areas of the United States and Canada. If inhaled, the fungus can cause mild breathing problems that may worsen and cause serious illness and even death.
It is difficult to obtain enough calcium without consuming milk or other dairy foods.
![Diphtheria. The bacteria that cause this disease, called Corynebacterium diphtheriae, proliferate in](https://biology-forums.com/gallery/47/medium_14755_11_11_12_7_18_44_100372029.jpeg)
![New England children like David, Joanna, and Abigail Mason (painted by an unknown artist around 1670](https://biology-forums.com/gallery/47/medium_374628_15_08_15_11_48_07_222261695.jpeg)