alexrjl collected a decent number of explanations here.I think it’s worth considering the wider story: similar drops were observed in the Netherlands and Portugal.
The Netherlands reimposed restrictions, whereas the UK opened up. I think the UK has simply overshot herd immunity and this leads to a sudden drop.
While Germany didn’t had drop in cases R also dropped for some reason.
One hypothesis I have for which I unfortunately haven’t found good data to check is increased humidity as a common factor that happened cross country in Europe.
alexrjl collected a decent number of explanations here.
I think it’s worth considering the wider story: similar drops were observed in the Netherlands and Portugal.
The Netherlands reimposed restrictions, whereas the UK opened up. I think the UK has simply overshot herd immunity and this leads to a sudden drop.
While Germany didn’t had drop in cases R also dropped for some reason.
One hypothesis I have for which I unfortunately haven’t found good data to check is increased humidity as a common factor that happened cross country in Europe.