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Chronic necrotizing aspergillosis has a slowly progressive process that, unlike invasive aspergillosis, does not spread to other organ systems or the blood vessels. It most often affects middle-aged and elderly individuals, spreading to surrounding tissue in the lungs. The disease often does not respond to conventionally successful treatments, and requires individualized therapies in order to keep it from becoming life-threatening.
Pubic lice (crabs) are usually spread through sexual contact. You cannot catch them by using a public toilet.
The Romans did not use numerals to indicate fractions but instead used words to indicate parts of a whole.
Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.
Allergies play a major part in the health of children. The most prevalent childhood allergies are milk, egg, soy, wheat, peanuts, tree nuts, and seafood.