Background Quantitative bias analysis (QBA) measures study errors in terms of direction,
magnitude and uncertainty. This systematic review aimed to describe how QBA has been …

Importance Vaccine effectiveness studies have rarely implemented strategies to reduce the
healthy vaccinee bias arising from differences in health care–seeking behavior between …

PURPOSE Seasonal influenza vaccination is recommended for patients with cancer despite
concerns of disease or treatment-associated immunosuppression. The objective of this study …

People with diabetes (PWD) have an increased risk of developing influenza-related
complications, including pneumonia, abnormal glycemic events, and hospitalization. Annual …

Background Linking data on laboratory specimens collected during clinical practice with
health administrative data permits highly powered vaccine effectiveness (VE) studies to be …

Background Some jurisdictions restrict primary care physicians' daily patient volume to
safeguard quality of care for complex patients. Our objective was to determine whether …

Introduction Annual influenza vaccination is recommended for older adults, but evidence
regarding the impact of repeated vaccination has been inconclusive. Aim We investigated …

Background Influenza is a common cause of acute respiratory infection that leads to
exacerbation of underlying chronic obstructive pulmonary disease (COPD). To elucidate the …

Uncertainty remains regarding the magnitude of effectiveness of influenza vaccines for
preventing serious outcomes, especially among young children. We estimated vaccine …

Background Annual influenza immunization is recommended for people with chronic
obstructive pulmonary disease (COPD) by all major COPD clinical practice guidelines. We …