Boris Johnson and the deputy chief medical officer Jonathan Van Tam this evening revealed their intense emotions after being told a coronavirus vaccine developed by Pfizer can now start to be rolled out across the UK. Mr Johnson described it as a 'huge moment' and also 'a very moving thing' while Mr Van Tam admitted he was 'quite emotional this morning' after he got the news that the Medicines and Healthcare Products Regulatory Agency (MHRA) had given the jab the green light. However, speaking on the day that his new Covid-19 tier system was implemented across England, Mr Johnson warned that the 'worst thing now would be to think that this is the moment when we can relax our guard'. The Prime Minister said it would be wrong to think it is 'game over in the fight against Covid' and 'this is not the end' as he urged people to stick to the new rules. The Joint Committee on Vaccination and Immunisation today published its priority list for which groups will receive the jab first, with elderly care home residents in the top category. But there are growing fears that care home residents could be made to wait for the vaccine because of the logistical challenges of moving around medicine which must be stored long term at -70C. Original Article: http://www.dailymail.co.uk/news/artic... Original Video: http://www.dailymail.co.uk/video/news... Daily Mail Facebook: / dailymail Daily Mail IG: / dailymail Daily Mail Snap: / 8392137033 Daily Mail Twitter: / mailonline Daily Mail Pinterest: http://pinterest.co.uk/dailymail Daily Mail Google+: https://plus.google.com/+DailyMail Get the free Daily Mail mobile app: http://dailymail.co.uk/mobile