48 hours<span>Most plaque hardens within 48 hours of formation, and within several days it will become so hard that it is almost impossible to remove. This hard substance is tartar and the only way to remove it is to see your dentist for a professional scraping of your teeth.
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Washing your hands, showering/bathing, and brushing your teeth
Health status is the correct answer
E. Many parents would be more inclined to have their children vaccinated against influenza if it did not involve an injection
