How long does the sore throat last when you have mono?

2 weeks or so

Neck-throat
Although the fatigue can last much longer
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Sore throat Throat Sore Mono Infectious mononucleosis Pharynx Throat pain

Mono

Neck-throat
Mono typically lasts about a month, but in more some cases it can take up to six months to fully resolve.
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Sore throat Throat Sore Mono Infectious mononucleosis Pharynx Throat pain

Days to weeks

Fever
Mostly sore throat from mono is an initial symptom and lasts about a week or ten days. Other symptoms may persist longer. Symptoms from mono are very variable, from asymptomatic to very sick with prolonged dysphagia (trouble swallowing), weakness, and fever.
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Fever Sore throat Asymptomatic Difficulty swallowing Throat Sore Mono Infectious mononucleosis Pharynx Throat pain