67 Dynamic changes in throat swab positivity and Streptococcus pyogenes genotypes: Implications for outbreak prediction - Ewurabena A. Mills; Ana Vieira; Nina Zhu; Yu Wan; Vins S’gro; Kai Yi Mok; Fazalhusein Z. Patvi; Lucy Reeves; Yimmy Chow; Theresa Lamagni; Juliana Coelho; Shiranee Sriskandan (Clinical Infection in Practice)