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Altimmune Inc. is making progress on its Covid-19 vaccine more than four months after jumping into that arena.

The Gaithersburg biopharma said Monday it has emerged from preclinical trials with positive results, positioning the clinical-stage company to start manufacturing the candidate, called AdCovid, in the third quarter of this year and start a phase 1 clinical trial in the fourth quarter.

Image: Dr. Vipin Garg is president and CEO of Altimmune. COURTESY ALTIMMUNE