In what countries is strep throat most common?

Strep throat is a bacterial infection of the throat and tonsils that is caused by the Streptococcus pyogenes bacteria. It is most commonly seen in children between the ages of 5 and 15, and is more common in the winter and spring months. Strep throat is most common in countries with temperate climates, such as the United States, Canada, Europe, and Australia. It is also common in some developing countries, such as India, China, and Brazil.