Results suggest that common side effects may have contributed to severe reactions in frail, elderly people.
The Norwegian Institute of Public Health said that it has updated the coronavirus vaccination guide with more detailed advice on vaccinating the elderly who are frail.
Last week authorities extended some COVID lockdown curbs until Jan. 18, including the temporary closure of hospitality venues and non-essential retailers.
The first daily vaccination statistics showed that nearly 2.3 million people had so far received their first doses of a COVID vaccine and nearly 400,000 had received a second dose.
He said SAGE did not recommend the Pfizer jab for travellers unless they were in a very high-risk group due to the very limited supply of anti-COVID drugs at present.
Johnson said more than 1.3 million people had been vaccinated as of Tuesday afternoon, adding that nearly 1,000 vaccination sites would be ready by the end of the week.
The Bank of Israel said on Monday it expects the economy to rebound quickly in 2021 if the country's fast start to vaccinating people against COVID-19 is maintained.