Thank you! I've been bringing up the sensitivity issue a lot recently, since it seems to be disregarded by many upset at the situation. I have a question for you if you don't mind: when so many people complain about lack of testing in the US, do you know what false-negative rates would exist for the tests we'd expect to see (like what they see available en mass in other countries)? And would you know what that level would need to be for the test to be useful?