Adverse Events After Same-Day COVID-19 and Influenza Vaccination Versus Influenza Vaccination Alone: A Target Trial Emulation
Annals of Internal Medicine
•
June 30, 2026
Same-day vaccination showed no safety increase
Same-day COVID-19 and influenza vaccination did not increase 90-day adverse event risk versus influenza vaccination alone. *Target trial emulation cohort study; Level 3.
- Level of evidence
- Level 3
- DocG quality score
- 7.5 / 10
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