Dr. Zaher’s disclosure could add to questions about the overall efficacy of the Sinopharm vaccine, which has been rolled out to at least six countries. The state-owned company has not reported detailed Phase 3 clinical data for scientists to independently assess the strength of its vaccines. Sinopharm did not respond to a request for comment.

Read more: https://www.nytimes.com/2021/03/22/world/the-uae-offers-a-third-dose-of-chinese-vaccine-to-some-with-low-immune-response.html