I don't know why this 70% figure has come from, but the prenetics testing kits the Premier League bought are 98.6% accurate.
And when 2 tests are run within a week, the chances of one being correct goes up to 99.986%
https://www.dailymail.co.uk/sport/s...-Premier-League-coronavirus-test-results.html
98.8% according to the CEO of a private company who manufactures the tests. Hardly an independent verified source.
Now this is an official government source - antibody tests can be wrong up to 50% of the time.
https://ktla.com/news/coronavirus/a...9-may-be-wrong-up-to-50-of-the-time-cdc-says/
Oh and I'm still waiting for your link on supposed daily testing once the season re-starts.