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ChicagoTribune 2021May4 s1p6 ApoorvaMandavilli NY Times
  Rustom Antia, Emory University in Atlanta
  early on 60% to 70% was atrgeted
  B.1.1.7 is 60% more transmissible
  experts now say the herd immunity threshold to be >80% immunization

ChicagoTribune 2020November26 s1p18 endCrisis  CandiceChoi,AP
  there may be herd immunity when 70% are vaccinated in May
  only prevent illness, not shedding and transmitting
  masks will remain crucial for some time
  before six weeks after innoculation, might not get as sick as they ordinarilly would
  effects could be interpreted wrongly mistakenly, side effects unlikely

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can herd immunity be achieved sooner with mask wearing predominate?
  https://www.cdc.gov/library/covid19/images/october2020/1030_FIG9.png
    https://www.cdc.gov/library/covid19/103020_covidupdate.html
  
https://www.quantamagazine.org/the-tricky-math-of-covid-19-herd-immunity-20200630/
 The Tricky Math of Herd Immunity for COVID-19
   different values of R0 in different settings
   exact herd immunity thresholds
 The threshold could be one number as long as a lot of people are wearing masks
 and avoiding large gatherings, and another much higher number if and when
 people let their guard down.

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https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2376879/  THIMEROSAL AND VACCINES
  organomercurials   ethylmercury bound to thiosalicylate  Merthiolate
  Congressman Dan Burton   Andrew Wakefield   Rick Rollens
name="anti"
https://www.bbc.com/news/uk-politics-54947661
  Covid-19: Labour calls for law to stop anti-vaccination fake news online
https://www.bbc.com/news/health-48585036
  How anti-vaccine movements threaten global health

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