THINK LIKE AN EPIDEMIOLOGIST:

The CDC’s recent announcement that the Delta variant has an average reproductive number of 6-9 has a lot of people concerned & many are asking me about whether this means we need COVID boosters.

Let’s talk through the math of how we might decide! pic.twitter.com/xtOcgebEIH

— Dr Ellie Murray, ScD 🇨🇦 (@EpiEllie) August 3, 2021