It's still a nonzero sample size, and if anything, says two things: (a) We should do more tests to increase N (b) If a $5 device tests you positive, maybe you

It's still a nonzero sample size, and if anything, says two things: (a) We should do more tests to increase N (b) If a $5 device tests you positive, maybe you should go get checked out for $5000 or whatever the doctors charge you (because insurance often only pays AFTER "shit happens" and often does not pay to test "whether shit might happen"), that you wouldn't have thought of doing otherwise.