claim: trial of oxford covid-19 vaccine in south africa begins
evidence_1: the first clinical trial in south africa and on the continent for a covid-19 vaccine was announced today, 23 june, at a virtual press conference hosted by the university of the witwatersrand, johannesburg (wits).", "we began screening participants for the south african oxford 1 covid-19 vaccine trial last week and the first participants will be vaccinated this week, says madhi, who is also the national research foundation/department of science and innovation sarchi (south african research chairs initiative) chair in vaccine preventable diseases, based at the university of the witwatersrand."
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
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