It is estimated that currently 1 in 13 people are infected in Ontario which means there is a 55% chance at least one person in your group of 10 is infected. This jumps to a 70% chance in groups of 15, 86.5% chance with 25 people and 98% chance at that office Christmas party of 50 people.
Estimate from ( https://covid19resources.ca/covid-hazard-index/ ) and calculator available at ( https://docs.google.com/spreadsheets/d/1qokCvvi6oRYRCKtrZuyeUmb5mt4LC9o8nKHLKoAUVAY/edit?usp=sharing ). 🧵 1/