Pre-delta, even: https://www.wsj.com/articles/the-delta-variant-is-more-contagious-heres-what-it-means-for-you-11627473901 https://www.wsj.com/articles/the-delt

Pre-delta, even: https://www.wsj.com/articles/the-delta-variant-is-more-contagious-heres-what-it-means-for-you-11627473901 https://www.wsj.com/articles/the-delta-variant-is-more-conta...