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Prof. Biol. @UW. Information flow in biology, society, & science. I love crows and ravens. he/him

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Jul 2, 2020 11:44 AM
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For the east coast morning crowd:

As colleges and universities explore ways of reopening safely in the autumn, the @CDC has made the inexplicable and irresponsible decision not to recommend testing asymptomatic individuals at entry, or on an ongoing basic. Thread:

Carl T. Bergstrom (@CT_Bergstrom):
This recommendation from @CDCgov, coupled with the rationale given, beggars belief.

This is thinest of absence-of-evidence arguments. https://t.co/QdYy5HKl7E
https://twitter.com/CT_Bergstrom/status/1278602810158768131


For me the crux of the issue with this recommendation is that you don’t need to run a specific return-to-school study to know the benefits of entry testing.

Think about all the things that would have to be true for entry testing not to help:

Carl T. Bergstrom (@CT_Bergstrom):
Imagine what would have to be true of young adults for re-entry testing to not be helpful.

For starters:

  1. No transmission from asymptomatic patients.

  2. No transmission from mildly symptomatic patients.

  3. No pre-symptomatic transmission, or >2 day turnaround on tests.
    https://twitter.com/CT_Bergstrom/status/1278604764020830208

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