Not really weak... Sona has the best Antigen test out there right now, so no, it's not weak, it's the best they have for Antigen tests, and it's reviewed by 3rd party. 84.6% sens and 90% spec
Quidel is 80 and 90 respectively
What we can hope for is to beat their numbers with our salivary test, but we aren't nearly as far ahead in the game as they are