“Aftershocks: Pandemic Politics and the End of the Old International Order,” written by Thomas Wright and Colin Kahl and due to be published Tuesday, reveals how Tedros lost patience with China: When a WHO scientist on a coronavirus origins probe announced in February that the idea that the virus leaked from a lab was “extremely unlikely” and unworthy of further investigation, senior WHO staff in Geneva were shocked. “We fell off our chairs,” one member told the authors.

The team in Wuhan appeared to have given in to Chinese pressure to dismiss the idea without a real investigation. Later, when the WHO-China team released a report that again dismissed that scenario, Tedros pushed back, saying that the research was not “extensive enough” and that there had not been “timely and comprehensive data-sharing.”

Since then, relations between the WHO and China have nosedived. Chinese officials said in July that they would not accept any further investigation into the origin of the coronavirus in China and accused the United States of pressuring scientists. The WHO last week released a statement that resisted the idea that “the origins study has been politicized, or that WHO has acted due to political pressure.”