A unique, high resolution study of 23 breakthrough infections (pre-Delta) shows how vaccination reduces transmission, leads to less virus culture positivity, for less days, less shedding, and may be tissue restricted (only found in saliva)https://t.co/XDtjThxaLV pic.twitter.com/4Gpn8vXTNd

— Eric Topol (@EricTopol) September 2, 2021