But "testing positive" is a lagging indicator of cases. It estimates how many *have* Covid today, not how many are *catching it* today.

Fortunately, ONS has re-introduced its incidence data (blue line), which is a much better yardstick for cases, though always 2 weeks old 😩. pic.twitter.com/MVaqvZtntW

— John Burn-Murdoch (@jburnmurdoch) July 30, 2021