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   From: omicron_bullshit@yahoo.com   
      
   Study found similar peak viral load with or without shots   
      
   Immunized household contacts have a 25% chance of infection   
      
   People inoculated against Covid-19 are just as likely to spread the   
   delta variant of the virus to contacts in their household as those   
   who haven’t had shots, according to new research.   
      
   In a yearlong study of 621 people in the U.K. with mild Covid-19,   
   scientists found that their peak viral load was similar regardless   
   of vaccination status, according to a paper published Thursday in   
   The Lancet Infectious Diseases medical journal. The analysis also   
   found that 25% of vaccinated household contacts still contracted the   
   disease from an index case, while 38% of those who hadn’t had shots   
   became infected.   
      
   The results go some way toward explaining why the delta variant is   
   so infectious even in nations with successful vaccine rollouts, and   
   why the unvaccinated can’t assume they are protected because others   
   have had shots. Those who were inoculated cleared the virus more   
   quickly and had milder cases, while unvaccinated household members   
   were more likely to suffer from severe disease and hospitalization.   
      
   “Our findings show that vaccination alone is not enough to prevent   
   people from being infected with the delta variant and spreading it   
   in household settings,” said Ajit Lalvani, a professor of infectious   
   diseases at Imperial College London who co-led the study. “The   
   ongoing transmission we are seeing between vaccinated people makes   
   it essential for unvaccinated people to get vaccinated to protect   
   themselves.”   
      
   Vaccination was found to reduce household transmission of the alpha   
   variant -- first discovered in the U.K. in late 2020 -- by between   
   40% and 50%, and infected vaccinated individuals had a lower viral   
   load in the upper respiratory tract than those who hadn’t had shots.   
   The delta variant has been the dominant strain globally for some   
   time, however.   
      
   The research also showed that immunity from full vaccination waned   
   in as little as three months. The authors said there wasn’t enough   
   data to advise on whether this should lead to a change in the U.K.’s   
   booster policy, where third doses are currently being offered to   
   older and more vulnerable people six months after their second shot.   
      
   Six months was an arbitrary time period chosen following early data   
   from Israel on the effectiveness of boosters, but there is no reason   
   to believe they would be less effective if given earlier, said Neil   
   Ferguson, an epidemiologist at Imperial College London and   
   investigator on the study, at a press briefing Thursday.   
      
   The booster program could help halt the virus, as extra shots or   
   repeated infections tend to lead to longer immunological memory,   
   potentially protecting people for up to a year, Lalvani said. More   
   data are needed to confirm this, he said.   
      
   The authors didn’t analyze infections based on the type of vaccines   
   people had received. Maria Zambon, head of influenza and respiratory   
   virology at the U.K. Health Security Agency, noted that there are   
   still more than 300 vaccines in development, and said it’s possible   
   that future generations of shots may be better at preventing   
   transmission.   
      
   https://www.bloomberg.com/news/articles/2021-10-28/getting-   
   vaccinated-doesn-t-stop-people-from-spreading-delta   
      
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