Quote Originally Posted by Pleck View Post
Hi Riff, on the news this morning it mentioned that a medical journal in the USA has just been released saying that about 40% of people are not being detected positive and that this is in all countries including Aust. Apparently this journal says that only a CT can definitely rule out being positive.
Actually a CT scan can only show the onset of pneumonia which can be caused by multiple different strains of virus including the coronavirus. But is currently being recommended by WHO as the fastest initial test for classification purposes.

To confirm if a person has ncovid-19 a blood culture test is needed but takes a few days for the results. Plus like you say some people do not present symptoms, that's why only a blood test can tell 100% if a person is infected.