London:The head of U.K.'s Medicines and Healthcare products Regulatory Agency (MHRA) on Wednesday said a "rolling review" had been used in the swift approval of the Pfizer/BioNTech COVID-19 vaccine, because "time is of the essence".
However, Dr June Raine also stressed that the quick approval of the vaccine "doesn't mean that any corners have been cut".
Read:|UK authorises Pfizer-BioNTech COVID vaccine
Dr Raine made the comments in a news conference following the announcement that the government had approved emergency use of the Pfizer/BioNTech vaccine, with the U.K. Health Secretary Matt Hancock confirming on Wednesday morning that immunizations would begin as early as next Monday.
"Most side effects are very mild and usually last for a day or so", Prof. Sir Munir Pirmohamed said.