From my understanding the US policy is to always use kits developed in domestically. The problem with the test was one of the reagents for negative control was

From my understanding the US policy is to always use kits developed in domestically. The problem with the test was one of the reagents for negative control was contaminated so it could not distinguish between positive and negative tests. This component of the test was suppose to be an extremely basic process, so much so that none of the epidemiological response plans ever accounted for this possible failure mode.