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Those may mean that its more transmissible, more severe, and may undermine the effectiveness of our vaccines. we just dont know the degree to which yet, or even for certain if it does. what this does suggest, though, is that what we must be doing is really redoubling what we should be doing head ning into a winte surge of the already contagious delta variant and focusing on those kinds of efforts we can control at this time. >> lets talk about this travel ban, if you will, to southern africa tha...