Some postings to consider.
These are from about 2 yrs ago.
https://qmap.pub/read/693
https://qmap.pub/read/694
https://qmap.pub/read/695
https://qmap.pub/read/734
https://qmap.pub/read/735
https://qmap.pub/read/762
https://qmap.pub/read/1220
2 year dates for most correspond with Covid19
++++!