3 ms·

Russia’s Sputnik V protects against severe Covid-19 from Delta variant, study

• rguiscard 5y ago
  “But whereas AstraZeneca uses the same adenovirus for both doses, Sputnik V uses two different types, to prevent antibodies against the first dose from rendering the second one ineffective. (J&J only uses one dose; a trial of a two-dose regimen is ongoing.)”