RDIF has proposed to start joint trial of which vaccine with Sputnik Light for a booster shot?

A. J&J

B. Moderna

C. Pfizer

D. Covaxin

Explanation:

The Russian Direct Investment Fund (RDIF) informed on August 11, 2021 that it has proposed to Pfizer to start joint combination trials with Sputnik Light for a booster COVID-19 vaccine shot.