Your toothbrush may play host to a wide variety of germs, including Staphylococcus aureus, fecal coliform bacteria, and the herpes simplex virus.
Yet while there are millions of germs in your mouth, there’s no research showing that bugs transferred to your brush can actually make you sick, according to the American Dental Association. “The chances of reinfecting yourself after you’ve been sick are very low,” says Ada Cooper, D.D.S., an ADA spokeswoman. Still, you should always rinse your brush in warm water and let it air-dry after each use. Don’t share it, and replace brushes as well as powered brush heads every three to four months.
Source: Consumer Reports on Health October 2018
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