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Earwax has antimicrobial properties that reduce the viability of bacteria and fungus in the human ear.

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About 3.2 billion people, nearly half the world population, are at risk for malaria. In 2015, there are about 214 million malaria cases and an estimated 438,000 malaria deaths.

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Most childhood vaccines are 90–99% effective in preventing disease. Side effects are rarely serious.

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Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.

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In ancient Rome, many of the richer people in the population had lead-induced gout. The reason for this is unclear. Lead poisoning has also been linked to madness.

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