Moderna Shares Spike After Company Says Its Covid Booster Increases Antibody Levels Against Omicron Posted byAmanda Breen December 20, 2021 Leave a comment on Moderna Shares Spike After Company Says Its Covid Booster Increases Antibody Levels Against Omicron The company also has plans to continue the development of a booster specifically targeting Omicron, which is expected to enter clinical trials in early 2022.