WHO have maintained for months that asymptomatic patients are not infectious.
Until very recently they still said
"The risk of catching COVID-19 from someone with no symptoms at all is very low."
They now say
"Some reports have indicated that people with no symptoms can transmit the virus. It is not yet known how often it happens. WHO is assessing ongoing research on the topic and will continue to share updated findings."
Yes, the WHO was incorrectly relying upon information provided by China. Since then it has become an accepted fact that asymptomatic transmission of SARS-CoV-2 is not only occurring, but is one of the primary transmission vectors.
Until very recently they still said
"The risk of catching COVID-19 from someone with no symptoms at all is very low."
They now say "Some reports have indicated that people with no symptoms can transmit the virus. It is not yet known how often it happens. WHO is assessing ongoing research on the topic and will continue to share updated findings."