https://www.siliconvalley.com/2021/02/03/comparing-coronavirus-vaccines-heres-how-they-work/ > (CNN) — Data on vaccines being tested by Johnson & Johnson and Novavax came out last week, and makers of AstraZeneca‘s vaccine and Russia’s Sputnik V vaccine published some long-awaited details about their shots on Tuesday. > All indicate high efficacy against the virus, even though they take very different approaches.