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That so far all the variants that we have seen delta variant seems to be more contagious and more dangerous and primarily one reason that makes it more dangerous is because it is escaping immunity and becoming more transmissible in particularly unvaccinated population. >> so just from a uk perspective, as an example, the uk has been particularly hart-hit and it seems its spreading prime maarily by youn people. give us a sense of whats happening there. what are you seeing? >> absolutely if we loo...