UW Virology Research Clinic
publication
January 5, 2022
NIAID Letter to Mix & Match Trial Participants
![](https://www.uwvteu.org/wordpress/wp-content/uploads/2022/01/covidvaccines-150x150.jpg)
We now have early results from the participants who received their original COVID-19 vaccine regimen before they joined the study, then got a COVID-19 booster dose during the trial of either the Moderna vaccine (standard 100 mcg dose), the Janssen vaccine, or the Pfizer-BioNTech vaccine.