I will say that it's true, as many have said, that laboratory tests currently in use could be improved. Certainly the current tests are more valid in diagnosing infection some time after the infection occurs and sometimes not in the early stages.
However, having said that, the diagnostic methods we use in Canada are the same as those developed and used by the U.S. Centers for Disease Control and Prevention and also endorsed by other public health organizations around the world, such as in the U.K. Also, it has been validated and accepted by experts within our Canadian Public Health Laboratory Network and the public health laboratories throughout the country.
The other laboratories referred to, for the most part in the U.S., are private laboratories that offer tests that—certainly I'll defer to my laboratory and other experts—are using assays that have not been adequately validated and established for use generally. Therefore, we go with what the U.S. CDC and other public health authorities indicate are there.