Rapidly waning vaccine effectiveness for influenza: How often should we revaccinate?

Journal of Travel Medicine
Volume 26, Issue 3, 2019
https://academic.oup.com/jtm/issue/26/3

 

Perspectives
Rapidly waning vaccine effectiveness for influenza: How often should we revaccinate?
Barnaby Young, MB BChir; Sapna Sadarangani, MBBS
Journal of Travel Medicine, Volume 26, Issue 3, 2019, tay154, https://doi.org/10.1093/jtm/tay154
Observations that influenza vaccine effectiveness declines within a few months after vaccination have important implications for travellers. Influenza vaccination prior to travel to areas where influenza is circulating needs to be considered even when a vaccine has been administered within the past year. However, recently described short-term benefits from early revaccination need to be weighed against the potential for reduced effectiveness with frequent revaccination.