coronavirus lockdown with the announcement of a new effective vaccine.The jab, developed by Pfizer and BioNTech, has been found to be 90% effective in preventing people from getting Covid-19 and could be rolled at as early as December.Nicola Sturgeon yesterday said news of the vaccine was 'extremely encouraging' and was the 'most positive indication yet that science will get us out of this'.However, she added that there are 'hurdles yet to be overcome' in order to get the population vaccinated.The UK has already secured 40million doses - enough to vaccinate up to 20million people, as each person will need two shots for it to work.With the UK population standing at more than 65million people, it means that not everyone will be able to get a.