The WHO is responsible for hundreds of thousands of deaths around the world. If you want to know how they failed, and why the U.S. suspended payments until they complete an investigation, here's a few reasons:
- 2019.12.31 Taiwan warns WHO of atypical pneumonia spreading in Wuhan that Wuhan authorities believed "it was not SARS", WHO not only ignored it, they suppressed the information from later reports that they were warned/asked to investigate. 
- 2020.01.14 WHO tweeted, "no clear evidence of human-to-human transmission of the novel #coronavirus (2019-nCoV)". 
- 2020.01.29 WHO tells us not to wear masks during COVID outbreak. 
- 2020.02.15 WHO's chief Tedros was telling the world, China has contained it, bought us time and is doing great... it already had person to person spread in the U.S., and China's numbers were frauds. 
- 2020.03.03 Since Dec, they've repeated that the death rate of COVID is 3.4%, which the R0 (contagion) and it's less stealth and requires a different response than a disease that is spreading wider (but the death rate is lower).  The facts are the R0 is likely double what the we thought and the death rate is <0.3% or 1/10th what the WHO claimed: these require radically different responses.
- 2020.04.14 WHO says that people shouldn't be allowed to Drink Alcohol during COVID lockdown as it, "exacerbate health vulnerability, risk-taking behaviours, mental health issues and violence". 
- 2020.04.25 WHO scares people with misleading tweet that no evidence that people who have recovered from #COVID19 have any immunity. This is false as plasma (antibody) therapy was helping, as well as would mean we couldn't vaccinate anyone. FakeNews like Bloomberg was repeating it. So WHO deleted it and later offered an update correcting it.