Risk factor All age groups China COVID-19
Risk factor Adults (18+) Elderly (65+) China COVID-19
Risk factor All age groups China COVID-19
Efficacy/effectiveness All age groups China Influenza
Risk factor Adults (18+) Elderly (65+) Canada COVID-19
Vaccine/vaccination Adults (18+) COVID-19
Risk factor Children (2-9 years) Adolescents (10-18 years) Adults (18+) Elderly (65+) China COVID-19
Risk factor All age groups China COVID-19
Risk factor All age groups Parents/caregivers Healthcare workers Travellers China COVID-19