No effect modification of influenza virus vaccine effectiveness by age or chronic condition was observed in the 2010/11 to 2017/18 seasons.
Ausenda MachadoAndreia LeiteAmparo LarrauriVerónica GomezAna Paula RodriguesIrina KislayaBaltazar NunesPublished in: Pharmacoepidemiology and drug safety (2021)
The potential effect modification of age or chronic condition was not observed within our study.