claim: epidemiological analysis of an outbreak in hong kong revealed that blood group o was associated with a greater risk of sars-cov-2 infection.
evidence_1: the findings revealed that the person having o blood type were less susceptible towards sars-cov infection in comparison with those having other blood types.", "the abo gene stands out among the genes involved since o blood group individuals were shown to have very low odds of infection compared to non-o individuals in a hospital outbreak that occurred in march 2003 in hong kong (cheng et al.", "epidemiological analysis of a hospital outbreak in hong kong revealed that blood group o was associated with a low risk of infection.", 
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  
  "yet, it is precisely what was observed in the case of a hospital outbreak of sars in hong kong, where o blood group individuals appeared at a much lower risk of being infected by sars-cov than subjects of other blood types (cheng et al.")