Article Ontario 2 histogram 2 hospitalization 2 influenza 2 adolescent 1 adult 1 age 1 aged 1 child 1 cohort analysis 1 coronavirus disease 2019 1 diabetes mellitus 1 drug cost 1 evidence-based pharmacy 1 female 1 health care delivery 1 health care organization 1 hospital discharge 1 human 1 immunization 1 immunocompromised patient 1 influenza vaccination 1 long term care 1 major clinical study 1 male 1 middle aged 1 ontario pharmacy evidence network atlas 1 pharmacist 1 pharmacy (shop) 1