Both vaccines are highly effective and either one is strongly recommended For immediate release: Wednesday, December 1, 2021 Boston, MA – Compared with the Pfizer COVID-19 vaccine, the Moderna COVID-19 vaccine has a slightly lower risk of COVID-19 outcomes, including documented SARS-CoV-2 infection, symptomatic COVID-19, and COVID-19-related hospitalization, intensive care unit (ICU) admission, and death, over a 24-week period, according to a team of researchers from the CAUSALab at Harvard T.H. Chan School of Public Health, Brigham and Women's Hospital, Harvard Medical School, and the Veterans Administration (VA). This pattern was consistent for periods when Alpha or Delta were the predominant variant. The study was published online December 1, 2021 in the New England Journal of Medicine. "Given the high effectiveness of both vaccines, either one is strongly recommended to any individual offered the choice between the two," said first author Barbra Dic...