Chief Medical Officer for England Chris Witty answers question during the daily presser on Covid-19

The transcript discusses the critical role of data in understanding infection rates during an epidemic. It highlights the importance of data for vaccine development and immunity evidence. Challenges in developing reliable serological tests and sampling issues are identified. Biological constraints, such as the time required for tests to be reliable, are also discussed. The transcript concludes with an overview of scientific progress and future expectations in data collection.

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