related_tweet: @mlevitt_np2013 the vaccine trials had covid-19 (disease with symptoms) as endpoint.
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  it was not designed to study transmission (including asymptomatic) of sars-cov-2 infection.