he's a infectious disease control and a senior lecture at the university of etc medical school. thank you very much for being with us for a specialist and infectious disease control. now the so called delta, very, and dr. is now the dominant strain as we heard in the u. k. there's been an increase in cases in germany as well. why is this very and far more transmissible than the others? what are its characteristics? so it's characteristics are, it is a better match for the ace to receptor on the human cells. so if this is the receptor, this is the virus, it forms a better, a better fix, a better attachment. and because it is a able to better attached to human cells, you need a few number of virus particles to set up a infection. so it's number one, a better attack, cher, and therefore you need fewer numbers to set up that infection. and as your report clearly indicated, it will become the dominant strain because it has a advantage in being able to infect humans, right? how high is the case fatally t rate with this particular variance compared to the alpha variance? for example? y