The petitioner-organisation had submitted that the present Coronavirus situation was out of control as cases of the coronavirus had increased in the country.
The MHRA said it would seek further information and was investigating as a matter of priority, and Pfizer and BioNTech said they were supporting the MHRA's investigation.
Pfizer and its partner BioNTech last month agreed to provide Israel with 8 million doses of the vaccine, which Britain became the first country to administer on Tuesday.
Britain began mass vaccinating its population on Tuesday in a global drive that poses one of the biggest logistical challenges in peacetime history, starting with the elderly and frontline workers.
Pfizer has said people with a history of severe adverse allergic reactions were excluded from their late stage trials.
U.S. lawmakers continued to negotiate over additional stimulus to help offset the economic impact of the pandemic while pursuing a stopgap government-funding bill.
German Chancellor Angela Merkel is urging regions to take much more drastic action to curb the spread, after state leaders agreed measures that would see comparatively modest social restrictions eased even further for the Christmas holidays.
Hailed as a success story during the first wave of the pandemic, Germany is now struggling to bring the second wave under control with new daily cases regularly topping the 20,000 mark.
The South American country has now registered 6,674,999 cases since the pandemic began, while its official death toll has risen to 178,159, according to ministry data.
The archipelago of nearly 270 million -- the world's third-biggest democracy and fourth most-populous nation -- delayed the vote originally set for September as it struggled to contain soaring virus cases.
She told the Bundestag lower house of parliament that the economies proving to be the most resilient were those that had managed to get the pandemic under control.
She said people in Germany had not reduced their contact with others to a sufficient degree. Germany has imposed a "lockdown light" in a bid to contain the spread of the coronavirus.
Compared with a year earlier, core orders, which exclude those for ships and electricity, rose 2.8pc in October, versus an 11.3pc drop seen by economists.
