Originally posted by the Voice of America. Voice of America content is produced by the Voice of America, a United States federal government-sponsored entity, and is in the public domain. Britain Approves Pfizer Coronavirus Vaccine, Raising Hopes of Return to Normality Henry Ridgwell LONDON - Britain says it plans to start injecting people with the Pfizer-BioNTech vaccine as early as Monday after becoming the first country to approve a COVID-19 vaccine following large-scale clinical trials. The British government approved the use of the coronavirus vaccine on Wednesday, after the Medicines and Healthcare Products Regulatory Agency (MHRA) announced it had completed its safety review. The decision marks a significant milestone in the battle against the pandemic, although challenges remain for poorer health systems in rolling out the vaccine. "The MHRA's recommendation has been reached following an extremely thorough and scientifically rigorous review of all the evidence of safety, of effectiveness and of quality of the Pfizer BioNTech vaccine," said Dr. June Raine, head of the MHRA, in a virtual press conference Tuesday. "The data showed that this vaccine is 95% effective. It is effective in all the groups that were given the vaccine within the trial, irrespective of age, sex, race or country that they lived in." Raine explained that the approval was completed so quickly because regulators had implemented a process known as a "rolling review." "A rolling review can be used to complete the assessment of a promising medicine or a vaccine in a situation where time is of the essence in the shortest time possible. But -- and this is a very important point indeed -- that doesn't mean that any corners have been cut. None at all," Raine said. .