.my first question is whether you have spent memorable nights (or days) sleeping out, under canvas or under a sky "as bland as silk"? If so: where, when, what happened that has stayed with you since & what do you recognise in Nan's descriptions of "nights out of doors"?

https://twitter.com/TomLondon6/status/1248689030553894912 uk Finding the Index Case, Patient Zero, of an epidemic is critical to understanding and curbing further transmission. Dating its first appearance, sequencing its genomes, following the changes in its genetic structure, and finding the root of its genetic family tree help estimate the epidemic’s scale and scope of transmission, find intermediate hosts, understand how spreading took place and curb future transmission by focusing resources to contain it. Since genetic sequencing data can only come from those who are diagnosed, health workers still rely on contact tracing to find people whose infections have gone undetected. Once a patient is diagnosed, their primary contacts must be located and questioned about relevant symptoms and, if any of those contacts themselves fall ill, they trigger a second layer of contact tracing and the workload grows exponentially. Covid-19’s long incubation and asymptomatic transmission can make the search herculean: Indian health officials contacted 2,666 people after the first case was confirmed in Karnataka.