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  1. Mar 2022
  2. twitter.com twitter.com
    Leo Poon on Twitter
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    1. jasminehollingworth 22 Mar 2022

      Leo Poon. (2022, January 15). @MackayIM @Clin_Chem_AACC HK has another lay of swiss cheese. Testing waste water to identify COVID positive buildings, following by mandatory testing on occupants. It can find some silent spreaders. Https://t.co/2wu6QG6Db1 [Tweet]. @world_epidemic. https://twitter.com/world_epidemic/status/1482189879010217986

      lang:en is:tweet COVID-19 waste water positive mandatory testing occupant spread detection case test virus
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    twitter.com/world_epidemic/status/1482189879010217986