People wearing masks visit Qianmen Street amid the coronavirus outbreak on March 7, 2020 in Beijing, China.

Throughout January, the World Health Organization publicly praised China for what it called a speedy response to the new coronavirus. It repeatedly thanked the Chinese government for sharing the genetic map of the virus "immediately," and said its work and commitment to transparency were "very impressive, and beyond words."

But behind the scenes, it was a much different story, one of significant delays by China and considerable frustration among WHO officials over not getting the information they needed to fight the spread of the deadly virus, The Associated Press has found.