If you got the Pfizer vaccine ‘probably’ you will need a third dose, says CEO of the pharmaceutical company Posted byEntrepreneur en Español April 16, 2021 Leave a comment on If you got the Pfizer vaccine ‘probably’ you will need a third dose, says CEO of the pharmaceutical company Did you think you were already protected? The pharmacist is considering applying a third dose of the Pfizer vaccine, since they do not know exactly how long it will take effect.