This Harvard Prof absolutely NAILS it. Most important piece I& #39;ve read on Covid. Vaccines will take time but what do we do now? Read for the answer. Coles Notes (that& #39;s Canadian slang): Health Canada and FDA need to approve rapid antigen tests. https://bit.ly/36ZZMkP ">https://bit.ly/36ZZMkP&q...

Basic stats tutorial is critical here on two sides, 1 = conditional probability & 2 = exponential growth @jkwan_md @DrKaliBarrett @michaelmina_lab @JustinTrudeau @CPHO_Canada

1=Conditional prob. If each tst has a 97% prob of sensing covid (abbot looks like 98%), then 2 tsts (if indep of each other) is a 99.91% chance of sensing. Say they aren& #39;t fully independent, the rate will still be above 98%. With so many asymptomatic, many 98% test results ishttps://abs.twimg.com/emoji/v2/... draggable="false" alt="⚡" title="Hochspannungszeichen" aria-label="Emoji: Hochspannungszeichen">

2 = Exponential growth. If you can find a few asymptomatic cases / spreaders and cut the rate of spread by 20%, then after a few wks, you& #39;ll reduce cases by 80%. 0.8^7 = 0.2. If each transmission cycle is a wk you& #39;ve cut cases by 80% in 7 wks.

Who wouldn& #39;t want to take an at home $5 test before going to visit grandma? Why don& #39;t we give $3 off gas or prescriptions or groceries or all of them if people take a rapid test at checkout? We& #39;d catch so so many cases that we& #39;d get exponential growth of the shrinkage kind https://abs.twimg.com/emoji/v2/... draggable="false" alt="👍" title="Thumbs up" aria-label="Emoji: Thumbs up">

Let& #39;s be smart. And live better sooner.

Pls approve these rapid tests Health Canada. They don& #39;t have to be that accurate to make a massive difference. Listen to the Harvard Prof...

@celliottability @TOPublicHealth @HealthCanada