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After you begin taking antibiotics, you will need to stay home for up to 48 hours to avoid spreading strep to someone else. A person is still infectious for the first 48 hours after beginning their course of antibiotics. Take care to avoid infectious contact with other people during this time. Do this after the first couple days of antibiotics, but before you finish your antibiotics. Otherwise, your old toothbrush could become a carrier and re-infect you once the antibiotics are done. When possible avoid contact with people with strep throat, especially during the contagious period (up to 48 hours after starting treatment). If a family member has strep throat, don't share glasses or utensils. Proper hand washing is the best way to prevent all kinds of infections. According to the CDC proper hand washing technique includes: Wet your hands with clean, running water (warm or cold), turn off the tap, and apply soap. Lather your hands by rubbing them together with the soap. Be sure to lather the backs of your hands, between your fingers, and under your nails. Scrub your hands for at least 20 seconds. Need a timer? Hum the "Happy Birthday" song from beginning to end twice. Rinse your hands well under clean, running water. Dry your hands using a clean towel or air dry them.
Stay at home for the first 24 to 48 hours. Throw away your toothbrush and get a new one. Avoid contact and don't share personal items. Wash your hands.