Developers of vaccines usually combine two vaccines to fight the same pathogen, and the study investigators are keen to apply the same strategy of having two COVID-19 vaccines combined.
Sputnik V reported 91.4-percent effectiveness from a second interim evaluation of over 18,000 people, strengthening a claim the team made on November 11 with limited evidence.
Russia's Sputnik V was met by mixed reactions from the world as some are happy and others are questioning its safety. In particular, Dr. Anthony Fauci is questioning the safety of Russia's coronavirus vaccine amid concerns that nations are cutting corners to win the vaccine race.