coronavirus as a second Covid-19 vaccine was approved by the regulator for use in the UK. The approval of the Oxford University/AstraZeneca will allow a "significant expansion of the immunisation programme, with hundreds more vaccination sites opening in the coming weeks and months to protect those most at risk from the virus", the government said.It said he UK regulator has accepted the recommendation of the Commission on Human Medicines and authorised the Oxford University/AstraZeneca Covid-19 vaccine following months of rigorous clinical trials involving tens of thousands of people and an extensive analysis of the vaccine’s safety, quality and effectiveness by the Medicines and Healthcare products Regulatory Agency (MHRA).The vaccine was.