In BC we've learned that we need to distinguish between the positivity rate for "testing due to symptoms or known exposure" and "testing for screening" (e.g. th

In BC we've learned that we need to distinguish between the positivity rate for "testing due to symptoms or known exposure" and "testing for screening" (e.g. the film industry tests all their crew daily). The former positivity rate is much higher, but the latter may be more useful as a long-term trendline to follow.