One of the merits of Robert Centor is that in 1981, he and his colleagues1 already showed that the prevalence of group A β-hemolytic streptococci (GAS) in the throat is 56% when the following 4 Centor criteria are present: fever of 38.5°C or higher, tonsillar exudate, absence of cough, and enlarged cervical glands. The validation of the Centor and McIsaac scores by Fine et al2 showed comparable results.