может быть нечто сезонное, с реинфекциями, придет весна и ребенок перестанет болеть; тонзиллиты/ангины бывают и вирусные:
In acute lymphadenitis of viral origin, lymph nodes involvement is typically bilateral and is frequently associated with upper respiratory tract infection. In most cases, cervical lymph nodes are involved. They are usually tender, with a small enlargement, and the overlying skin does not appear erythematous...
The viruses that most frequently cause acute lymphadenitis associated with upper respiratory tract infection include rhinovirus, parainfluenza virus, influenza virus, respiratory syncytial virus, common coronaviruses, and adenovirus. In these cases, acute lymphadenitis is often associated with other signs and symptoms such as fever, ear pain, or pharyngitis with sore throat...
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