PPSC Manager AUQAF (20M2020), PPSC Solved Past Papers MCQs, World Current AffairsWhich country has become the world’s first to successfully complete human trials of its COVID-19 vaccine? Posted on March 31, 2021 by Rana TahirA. China B. Russia C. USA D. KSAShare this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window)Click to share on WhatsApp (Opens in new window)Click to share on Pinterest (Opens in new window)Click to share on LinkedIn (Opens in new window)