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By Francesco Guarascio

BRUSSELS, Dec 20 (Reuters) - Novavax is expected to start delivering its COVID-19 vaccines to the European Union in the first quarter of 2022, an EU source said, as experts for the region's drug regulator met on Monday to decide whether to approve the shot.

The EU Commission had no immediate comment and the U.S. biotech company was not immediately available for comment. The EU source declined to be identified because they were not authorised to speak to the media.

If approved, the two-dose vaccine, branded Nuvaxovid, would be the fifth coronavirus shot to be brought on to the EU market and arrives as the Omicron coronavirus variant spreads.