Covid-19: Delta infections threaten herd immunity vaccine strategy

@article{Dyer2021Covid19DI,
  title={Covid-19: Delta infections threaten herd immunity vaccine strategy},
  author={Owen Dyer},
  journal={BMJ},
  year={2021},
  volume={374}
}
TheCDCpublished theProvincetowndata on 30 July, but a slide presentation mentioning the findings on viral loadwasobtained in advanceby theWashington Post.2 Epidemiologists who were shown these findings told the newspaper that they changed the calculus going forward. “I finished reading it significantly more concerned than when I began,” said Robert Wachter, chairman of the Department of Medicine at the University of California at San Francisco. 
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Findings from this investigation suggest that even jurisdictions without substantial or high COVID-19 transmission might consider expanding prevention strategies, including masking in indoor public settings regardless of vaccination status, given the potential risk of infection during attendance at large public gatherings that include travelers from many areas with differing levels of transmission. Expand