Many possibilities: Inadequate therapy, re-exposure or frequent exposure to persons with causative organisms (like schoolteachers), changes in immune function, chronic tonsillar infection, and so on and so on.
Answered 3/24/2020
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4 doctors weighed in across 2 answers
A doctor has provided 1 answer
3 doctors weighed in across 2 answers
A doctor has provided 1 answer
A doctor has provided 1 answer
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