Discover and read the best of Twitter Threads about #backwardcontacttracing
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People are talking about *forward* and *backward* #ContactTracing #COVID19
What do they mean?
I made a case study for the @GOARN @WHO contact tracing group
A fictional contact tracer’s tale
My slides are here:
ispmbern.github.io/covid-19/Forwa…
Short thread (1/7)
What do they mean?
I made a case study for the @GOARN @WHO contact tracing group
A fictional contact tracer’s tale
My slides are here:
ispmbern.github.io/covid-19/Forwa…
Short thread (1/7)
Most #ContactTracing seeks contacts from 2 days before the infected person developed symptoms
#SARSCoV2 can be transmitted before symptoms emerge.
That is looking *forwards*
Who might the index case have infected?
Contacts in quarantine soon enough won’t infect others
2/7
#SARSCoV2 can be transmitted before symptoms emerge.
That is looking *forwards*
Who might the index case have infected?
Contacts in quarantine soon enough won’t infect others
2/7
Forward contact tracing can break onward transmission chains.
But it doesn’t find the source who infected the index case
To find the source, we need to go *backwards*
Index cases are more likely to have been infected by a source, who also infected others in a cluster
3/7
But it doesn’t find the source who infected the index case
To find the source, we need to go *backwards*
Index cases are more likely to have been infected by a source, who also infected others in a cluster
3/7
