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  1. May 2021
  2. www.theguardian.com www.theguardian.com
    Brazil variant evaded up to 61% of immunity in previous Covid cases
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    1. Lu17Cheryl 09 May 2021

      the Guardian. “Brazil Variant Evaded up to 61% of Immunity in Previous Covid Cases,” March 2, 2021. http://www.theguardian.com/world/2021/mar/02/brazil-variant-evaded-immunity-previous-covid-cases.

      lang:en COVID-19 Coronavirus pandemic immunity Brazil coronavirus variant infection immune system vaccination UK home test kits South Africa is:webpage
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    theguardian.com/world/2021/mar/02/brazil-variant-evaded-immunity-previous-covid-cases