whole genome sequencing, GAS, impetigo, transmission, asymptomatic carriage, group A streptococcus, household, skin sores, pyoderma
influenza, hepatitis C, varicella, herpes zoster, chickenpox, shingles, group A Streptococcus, invasive group A streptococcal disease, Streptococcus pyogenes, self-controlled case series