AdvertisementJ&J Says A Booster Shot For Its Vaccine May Have Big BenefitsUpdated August 25, 2021Joe HernandezJoe NeelRob SteinfacebookEmailA nurse fills a syringe with Johnson & Johnson's COVID-19 vaccine at a clinic in Pasadena, Calif., on Thursday. (AFP via Getty Images)This article was originally published on August 25, 2021.