Moderna’s Third Dose Boosts Antibodies Against Omicron (2)

A third dose of Moderna Inc.’s Covid-19 vaccine increased antibody levels against the omicron variant, results the company described as reassuring while it works on a shot tailored to the new strain.

A 50 microgram booster dose produced a 37-fold increase in neutralizing antibodies, the company said in a statement Monday. That is the same dose as the currently authorized Moderna booster, which is half the dose used for primary immunization. The company also tested a 100 microgram dose, which increased antibody levels 83-fold compared with the primary two-dose course.

The results add to a growing body of evidence ...