September 2, 2021
World Health Organization (WHO)
“How efficacious is the vaccine? The AZD1222 vaccine against COVID-19 has an efficacy of 63.09% against symptomatic SARS-CoV-2 infection.”
Copyright, Licensing and Permissions
https://www.who.int/about/policies/publishing/copyright
WHO supports open access to the published output of its activities as a fundamental part of its mission and a public benefit to be encouraged wherever possible.
WHO’s open access applies to:
- all publications published by WHO CC BY-NC-SA 3.0 IGO;
- articles or chapters published in non-WHO publications that are authored or co-authored by WHO staff CC BY 3.0 IGO or CC BY-NC 3.0 IGO;
- articles or chapters published in non-WHO publications that are authored or co-authored by individuals or institutions funded in whole or in part by WHO CC BY 3.0 IGO or CC BY-NC 3.0 IGO.
document
breakthrough cases