On this page, find out more about how diphtheria and the invasive H. flu were wiped out as the result of progress in modern medicine.
2. Diphtheria
Diphtheria is an infection of the bacteria Corynebacterium diphtheriae and mainly affects the nose and throat. The bacteria spreads through airborne droplets and shared personal items. C. diphtheriae creates a toxin in the body that produces a thick, gray or black coating in the nose, throat, or airway, which can also affect the heart and nervous system. Even with proper antibiotic treatment, diphtheria kills about 10 percent of the people who contract it. The first diphtheria vaccine was unveiled in 1913, and although vaccination has made a major dent in mortality rates, the disease still exists in developing countries and other areas where people are not regularly vaccinated. The World Health Organization (WHO) estimates that worldwide there are about 5,000 deaths from diphtheria annually, but the disease is quite rare in the United States, with fewer than five cases reported each year.
3. Invasive H. Flu
Invasive H. flu, or Hib disease, is an infection caused by the Haemophilus influenzae type b (Hib) bacteria, which spreads when an infected person coughs, sneezes, or speaks. Invasive H. flu is a bit of a misnomer because it is not related to any form of the influenza virus. However, it can lead to bacterial meningitis (a potentially fatal brain infection), pneumonia, epiglottitis (severe swelling above the voice box that makes breathing difficult), and infections of the blood, joints, bones, and pericardium (the covering of the heart). Children younger than five years old are particularly susceptible to the Hib bacteria because they have not had the chance to develop immunity to it. The first Hib vaccine was licensed in 1985, but despite its success in the developed world, the disease is still prevalent in the developing world. WHO estimates that each year Hib disease causes two to three million cases of serious illness worldwide, mostly pneumonia and meningitis, and 450,000 deaths of young children.
If you're not familiar with diseases like the invasive H. flu, see the next page to read about the cures for more household name diseases such as the measles.
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