December 2, 2021

WHO calls for further studies, data on origin of SARS-CoV-2 virus, reiterates that all hypotheses remain open

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WHO director Tedros Ghebreyesus, who received the full report on the weekend, said it advances understanding in important ways, while raising questions that will need to be addressed by further studies.

“As far as WHO is concerned, all hypotheses remain on the table. This report is a very important beginning, but it is not the end. We have not yet found the source of the virus, and we must continue to follow the science and leave no stone unturned as we do,” said Dr Tedros. “Finding the origin of a virus takes time and we owe it to the world to find the source so we can collectively take steps to reduce the risk of this happening again. No single research trip can provide all the answers.”

The WHO noted that from the very beginning of the pandemic the organization has stressed the need to understand the origin of the virus in order to better understand the emergence of new pathogens and possible exposures.

Only a few weeks into the outbreak, the IHR Emergency Committee of independent experts recommended that WHO and China pursue efforts to identify the animal source of the virus. 

Throughout 2020, WHO continued to discuss with China and other Member States the need to study and share information around the virus origins. 

The World Health Assembly resolution of May 2020, which was adopted by all Member States, cited a need “to identify the zoonotic source”:

  • WHA73.1 from 19 May 2020: 9. (6) to continue to work closely with the World Organisation for Animal Health (OIE), the Food and Agriculture Organization of the United Nations (FAO) and countries, as part of the One-Health Approach to identify the zoonotic source of the virus and the route of introduction to the human population, including the possible role of intermediate hosts, including through efforts such as scientific and collaborative field missions, which will enable targeted interventions and a research agenda to reduce the risk of similar events occurring, as well as to provide guidance on how to prevent infection with severe acute respiratory syndrome coronavirus 2 (SARS-COV2) in animals and humans and prevent the establishment of new zoonotic reservoirs, as well as to reduce further risks of emergence and transmission of zoonotic diseases;

In July 2020 WHO sent a small team to China to plan a joint study comprising Chinese and independent international scientists.

It was agreed that WHO would select the international scientists. The Terms of Reference for the Virus Origins Study were completed by fall 2020.

The team of scientists came from around the world: Australia, China, Denmark, Germany, Japan, Kenya, Netherlands, Qatar, the Russian Federation, the United Kingdom, the United States of America and Viet Nam.

The joint international team comprised 17 Chinese and 17 international experts from 10 other countries as well as the World Organization for Animal Health (OIE); and WHO.  

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