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
Coverage Adolescents (10-18 years) Adults (18+) Parents/caregivers Healthcare workers United States of America
Efficacy/effectiveness Coverage Adolescents (10-18 years) Adults (18+) United States of America
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