for the flu. WHO (and CDC) standards for when to administer a test for COVID-19 are quite narrow...unlike the flu.
https://www.bloomberg.com/news/articles/2020-03-06/coronavirus-s-true-lethal-power-still-eludes-disease-experts
....Most countries follow WHO guidelines, which limit the scope of tests by establishing criteria for suspected cases. They call for checking patients who’ve had symptoms and traveled to countries where the new virus has taken hold, like China, Iran or Italy, or who came into contact with a confirmed case. They’re also testing those admitted to a hospital with severe pneumonia.