From: here@is.invalid   
      
   Covid infection induces high levels of immunity but patients still   
   able to carry virus, study shows   
      
   Natural immunity lasts at least five months, according to research   
   from Public Health England   
      
   Infection with Covid-19 provides up to 83 per cent protection against   
   the virus for at least five months, a new government study has shown -   
   though experts have warned that those with natural immunity may still   
   be able to carry and transmit the pathogen to others.   
      
   Research conducted by Public Health England (PHE) has found that prior   
   infection offers levels of protection similar to those induced by the   
   Covid-19 vaccine, with only a small proportion of people retesting   
   positive after primary exposure to the virus.   
      
   In those rare instances of reinfection, most did not display any   
   symptoms, according to the first report from PHE's Siren study - which   
   has been regularly testing tens of thousands of healthcare workers   
   across the UK since June.   
   ...   
   ...   
   ...   
   However, this means that many people who contracted the disease in the   
   first wave may now be vulnerable to catching it again, PHE said, as it   
   urged people who have been infected not to let their guard down.   
      
   PHE said although those with antibodies are unlikely to become ill   
   again with Covid-19, early evidence from the next stage of the study   
   suggests that some of these individuals can still carry high levels of   
   virus and continue to pass it on to others.   
      
      
      
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    * Origin: you cannot sedate... all the things you hate (1:229/2)