More cautious behaviour? Fewer care homes? Some degree of herd immunity (even though likely <20% have had it). Genuinely curious.
theguardian.com/world/2020/may…
Is it that behaviour have changed more in London? Some evidence to support that from @jburnmurdoch. /5
Or have more people had it than we think? Antibody tests may tell us that soon. /9
But it has to be said there's lots of scepticism from many scientists about any herd immunity explanation. /10