The BNT162b2 COVID-19 vaccine has been shown to reduce viral load of breakthrough infections (BTIs). Here, analyzing viral loads of BTIs post third vaccine shot, Levine-Tiefenbrun et al. show waning of the booster’s effectiveness in reducing infectiousness within months, mirroring the rate and magnitude of decline observed post the second shot.
- Matan Levine-Tiefenbrun
- Idan Yelin
- Roy Kishony