Scientists from the University of Birmingham and the Public Health England, UK, have recently investigated the dynamics of immune responses in elderly people who have received two doses of the Pfizer/BioNTech coronavirus disease 2019 (COVID-19) vaccine at a standard or extended interval. The study findings reveal that an extended interval vaccination can enhance the humoral immune response by 3.5-fold. The study is currently available on the medRxiv* preprint server.
