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People often find it difficult to accept the idea that bacteria can be beneficial and improve health. Lactic acid bacteria are good, and when eaten, these bacteria improve health and increase longevity. These bacteria included in foods such as yogurt.
Earwax has antimicrobial properties that reduce the viability of bacteria and fungus in the human ear.
Human kidneys will clean about 1 million gallons of blood in an average lifetime.
As many as 28% of hospitalized patients requiring mechanical ventilators to help them breathe (for more than 48 hours) will develop ventilator-associated pneumonia. Current therapy involves intravenous antibiotics, but new antibiotics that can be inhaled (and more directly treat the infection) are being developed.
On average, the stomach produces 2 L of hydrochloric acid per day.