Asymptomatic Transmission of Sars Cov 2 and isolation

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Dear Public Health England,

The attached article form the BMJ states "The transmission rates to contacts within a specific group (secondary attack rate) may be 3-25 times lower for people who are asymptomatic than for those with symptoms.1121415 A city-wide prevalence study of almost 10 million people in Wuhan found no evidence of asymptomatic transmission".

1. What is the evidence -ie scientific papers/reports- being used by our government to demonstrate that asymptomatic transmission of Sars Cov 2 is at a dangerous level?
2. What evidence is there that the Sars Cov 2 virus has been isolated?

https://www.bmj.com/content/371/bmj.m485...

Yours faithfully,

Chris Moffett

FOI, Public Health England

OFFICIAL

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Public Accountability Unit
Public Health England
[Public Health England request email]
Tel: 020 8327 6920
www.gov.uk/phe Follow us on Twitter @PHE uk

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FOI, Public Health England

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    2927 FOI Request evidence of isolation and asymptomatic transmission of SARS CoV 2.pdf

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OFFICIAL
Dear Chris Moffett

Please find attached Public Health England's response to your request.

FOI Team
Public Accountability Unit
Public Health England
[Public Health England request email]
www.gov.uk/phe Follow us on Twitter @PHE uk

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