Is the South African COVID variant immune to vaccines? Al Jazeera English - 19 Apr 2021 Is the South African COVID variant immune to vaccines? ... More
Turkish study revises down Sinovac COVID-19 vaccine efficacy to 83.5% Reuters - 03 Mar 2021 Turkish study revises down Sinovac COVID-19 vaccine efficacy to 83.5% ... More
Sinovac: Brazil results show Chinese vaccine 50.4% effective BBC - 13 Jan 2021 Sinovac: Brazil results show Chinese vaccine 50.4% effective ... More