I haven't seen any reliable information that the WHO test (or protocol) produced 40 or 47 percent false positives.
This morning on MSNBC the governor of Michigan, Gretchen Witmer said that she is trying to get the WHO tests for her own state of Michigan, since they are not getting testing kits from the US Government.
So I think the article quoted above has some inconsistencies as to whether or not there were tests shipped by WHO, and not just a protocol test design that countries could adopt and make on their own.
BBM
"Testing began at the CDC, and on February 5, the agency
announced it would begin shipping test kits to public health labs around the country. Just a day later, the
World Health Organization said it had already shipped 250,000 tests to more than 70 laboratories around the world.
As
WHO shipped hundreds of thousands of tests, broader US testing struggled to begin. Days after CDC's tests shipped, some labs reported that the test kits were not working as expected, which eventually required tests be re-manufactured."
Missing in that article is the reason our own CDC developed faulty tests.
But thanks for posting the article, it's very hard to get the truth.