Although they don't change much day-to-day, I never get bored looking at these charts, because of the positive message behind them. and is that the first sign of the 70-74 line accelerating downwards? (just at the right time, 3 weeks after the peak vaccinations started) 1/n 
and here's more boring data, with the sub-groups of 80+ all now consistently showing case rates (as a % of the all-ages total) >25% lower than they were in late January 2/n
some have asked me: why is the deviation not larger, when we know (from PHE/PHS published data) that the vaccines are more than 25% effective, and take-up has been nearly 100% in these age groups? And I think the answer is: 3/n
a) you need to remember that we're measuring case rates as a % of the all-age-group total (in order to remove the aggregate effect of the lockdown)
b) but lockdown works slightly less well for 80+, as we saw in Lockdown 2 in November - so we'd normally expect the 80+ cases 4/n
b) but lockdown works slightly less well for 80+, as we saw in Lockdown 2 in November - so we'd normally expect the 80+ cases 4/n
as a % of the total to *rise* during lockdown. Hence the vaccine is having to fight against that effect, and the deviation / reduction that we see is the net effect of the two effects - and hence is less than we expect. It doesn't mean the vaccine isn't working (it is). /end
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