It’s a brand new virus. We don’t even know how to treat it yet. Creating kits that accurately detect it is not something you develop overnight. I understand the problems. The test kits China is using (or lack their of) must not be good because the infection rate is high and the deaths are high. In fact they just wait for people to get sick and put them into the hospital
Korea has been doing thousands a day. They certainly are addressing the issue.
The CDC did less than 10, during most of the week.