Coronavirus vaccine produced by American drug company Pfizer and its German partner BioNTech has no link to reported post-vaccination deaths and no new side effects, the European Union's medicines regulator said Friday based on the first data from the vaccine's rollout.

The update by the Amsterdam-based European Medicines Agency (EMA) followed reports that dozens of mainly elderly people had died in Norway and other European countries after receiving a first shot of the vaccine.

The EMA said it had looked at the deaths and "concluded that the data did not show a link to vaccination with Comirnaty (the vaccine) and the cases do not raise a safety concern."

In its first safety update since the EU started its vaccination campaign in December, the watchdog said that overall, data "is consistent with the known safety profile of the vaccine, and no new side effects were identified."

Reports of occasional severe allergic reactions did not go beyond what had already been found about this "known side effect," it added. "The benefits of Comirnaty in preventing COVID-19 continue to outweigh any risks, and there are no recommended changes regarding the use of the vaccine," the EMA said.

The EU watchdog has so far approved two vaccines by Pfizer-BioNTech and Moderna. It is set to give its verdict on a third, by AstraZeneca, later Friday. Germany recommended Thursday that the AstraZeneca vaccine should only be given to under-65s.

The frail and the elderly are first in line for vaccinations in many countries. Norway in particular registered 33 deaths among some 20,000 retirement home residents who had received their first dose of the Pfizer-BioNTech vaccine.

Concern grew as a number of countries, including France, Denmark, Finland, Iceland and Sweden, gave similar reports. Oslo said earlier this month it had not established a link but recommended doctors consider the overall health of the most frail before giving them the jab.

The EMA said that "given concerns which arose from Norway" it had reviewed reports of deaths of people of any age after receiving the jab.

"In many cases concerning individuals above 65 years of age, progression of (multiple) pre-existing diseases seemed to be a plausible explanation for death," it said.

Some had already received palliative care, it said. The EMA noted that clinical trials of the Pfizer vaccine had included people aged 75 and older. But the watchdog said it had asked the company to keep "reviewing all reports of suspected side effects with fatal outcome thoroughly."