A recent study by a team of scientists at Beth Israel Deaconess Medical Center and Janssen Vaccines & Prevention has demonstrated that humoral and cellular immunity elicited by the coronavirus disease 2019 (COVID-19) vaccine Ad26.COV2.S remains active for at least eight months.
Moreover, the vaccine exhibits potent neutralizing efficacy against more infectious variants of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), including B.1.1.7 (Alpha), B.1.351 (Beta), B.1.617.2 (Delta), and P.1 (Gamma) variants. The study is currently available on the medRxiv* preprint server while awaiting peer review.
