Without antibiotics, strep remains contagious for 2–3 weeks. Within 24 hours of starting an appropriate antibiotic and once fever-free, transmission risk drops dramatically. Always finish the full course even after feeling better.
How long is strep throat contagious?
Quick answer:
Contagious until 24 hours after starting antibiotics and until fever-free — most people can return to school or work the next day after beginning treatment.
Get strep treatment today
Walk in 6 days a week at 1102 West Kemper Rd., Forest Park — or book online and skip the wait. Most visits under an hour.
