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Pubic lice (crabs) are usually spread through sexual contact. You cannot catch them by using a public toilet.
The toxic levels for lithium carbonate are close to the therapeutic levels. Signs of toxicity include fine hand tremor, polyuria, mild thirst, nausea, general discomfort, diarrhea, vomiting, drowsiness, muscular weakness, lack of coordination, ataxia, giddiness, tinnitus, and blurred vision.
Drugs are in development that may cure asthma and hay fever once and for all. They target leukotrienes, which are known to cause tightening of the air passages in the lungs and increase mucus productions in nasal passages.
There are more bacteria in your mouth than there are people in the world.
Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.