Moderna Inc is recalling 764,900 doses of its Covid-19 vaccine after a vial, made by its contract manufacturer Rovi, was found contaminated by a foreign body, 7NEWS Australia reports.

The doses were distributed in Norway, Poland, Portugal, Spain, and Sweden in January.

Moderna said the contamination was found in just one vial, and it was recalling the whole out of "an abundance of caution". The company said it did not believe the contamination posed a risk to other vials in the lot.