When 10-year-old Paul Toala had to "open wide" for a nurse, his tonsils were found to be red, inflamed and "enormous".
Paul, of Rongomai School in East Tamaki, said his throat became sore the night before nurse Tracy McKee checked him for symptoms of streptococcal throat infection.
An untreated group A "strep" throat infection can lead to acute rheumatic fever, an auto-immune response that can damage the heart valves and lead to prematuredeath.
Rheumatic fever is linked to poverty, overcrowding and poor access to healthcare. Maori people are 10 times more likely, and Pacific people 21 times more likely, to be admitted to hospital with the disease than Europeans or other ethnicities, Otago University research has shown.
The Government is trying to stamp out the disease in a $24 million, five-year campaign that includes sore-throat clinics at schools in low-income areas of seven health districts.