The WHO is the same organisation that has been telling people that face masks are not useful [1], repeating claims like no H2H transmission while ignoring warnings from Taiwan, discouraging travel restrictions and bans as late as Feb 29th citing trade and economic impacts (!!!) [2], and even fearmongering tweets like people can be infected with COVID19 twice (that they shortly retracted) [3]; so it's really hard to take this body as credible.
[1]: https://www.sciencemag.org/news/2020/03/not-wearing-masks-pr...
[2]: https://www.who.int/news-room/articles-detail/updated-who-re...
[3]: https://reason.com/2020/04/26/world-health-organization-twee...