the alpha or uk dominant in the uk understandably. what happened over that time period? the numbers came down overall which was good but at the same time the delta variant started to enter the scene there, you saw the numbers pop back up. primarily people who had not been vaccinated. that is the concern here and this is a much more transmissible variant. the uk or alpha variant was 50% more transmissible than the strain before that and this is 60% for transmissible than the alpha variant. in scotland a study showing people infected with the delta variant were more likely to be hospitalized. . appears to be more transmissible and more serious. for more on this i m joined by muhammad munir, virologist at lancaster university in england.