Taken at the same time. This better sensitivity, combined with much nicer feeling swabs, is why I buy Abbot PanBio instead of using the crappy free BTNX tests from the grocery store.
Levitt Safety is Canada’s Panbio distributor - $52 for a box of 10: https://www.levitt-safety.com/Product/IA41FK701
Of course this cost is out of reach for many, and free BTNX tests are far better than having no tests.
Today BTNX shows very strong, maybe even stronger than what I saw from PanBio today:
