Dr. Robert Malone
![Dr. Robert Malone](https://video.newsserve.net/700/v/20220128/1643398828-Dr-Robert-Malone.jpg)
Dr. Robert Malone
Moderna said on Wednesday that it had started a mid-stage study, testing a booster dose of its COVID vaccine specifically designed to target the Omicron variant, a day after rival Pfizer launched a similar trial.