$MRNA Starts Clinical Trial of Omicron Booster


Moderna expects to enroll about 600 adult participants ages 18 and over split between two groups. Participants in the first group will have previously received two-doses of Moderna’s original vaccine, and participants in the second group will have previously received the two-dose vaccine and the currently authorized booster shot.

Participants in both groups will receive a single dose of the omicron specific booster.

Moderna also published data on how its 50 microgram booster shot is holding up against omicron. Six months after the third shot, the antibodies that block omicron infection declined, but they still remained detectable in all participants. The data indicates that while the booster weakens over time, it still provides some protection against the variant.

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