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FILE PHOTO: Nurse Ellen Quinones prepares a dose of the Moderna's coronavirus disease (COVID-19) vaccine at the Bathgate Post Office vaccination facility in the Bronx, in New York, U.S., January 10, 2021. Kevin Hagen/Pool via REUTERS - 

Moderna said on Friday (Sep 3) it had asked the EU drugs regulator for conditional approval of a booster shot of its COVID-19 vaccine at a 50mg dose.

The company also said it had completed data submission for the use of a third booster dose of its two-shot vaccine to the US Food and Drug Administration.

Moderna said clinical study data and additional analyses showed that a 50mg booster dose of its COVID-19 vaccine induces robust antibody responses against the Delta variant. The company's original vaccine contains 100 micrograms of mRNA in each shot.

The submissions come as several countries, including the United States, are already offering or have plans to give booster doses of COVID-19 vaccines to the vulnerable or those with weak immune systems amid the spread of the highly contagious Delta variant.

The European Centre for Disease Prevention and Control (ECDC) earlier this week said there was no urgent need for booster doses of COVID-19 vaccines for the fully vaccinated//CNA