ishtat
Literotica Guru
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- Aug 29, 2004
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Since Covid first broke out we have been accustomed to hearing that we need 70 to 80 % to be fully vaccinated to achieve Herd Immunity. However, the Delta strain has a much higher threshold 88 to 90% which compares with Polio at 86%, measles at 95% or Smallpox at 75%.
Three viral diseases Smallpox, Rinderpest and Polio have all been eliminated, the first two being extinct. Herd immunity in these diseases eventually contributed, but only after an almost total acceptance of a universal vaccination campaign.
Given the strong opposition to Covid vaccination and the apparently increasing ineffectiveness of MRNA vaccines over time (Pfizer, Moderna, J& J) to the Delta strain, it seems that the elimination of Covid is still a long way off.
Three viral diseases Smallpox, Rinderpest and Polio have all been eliminated, the first two being extinct. Herd immunity in these diseases eventually contributed, but only after an almost total acceptance of a universal vaccination campaign.
Given the strong opposition to Covid vaccination and the apparently increasing ineffectiveness of MRNA vaccines over time (Pfizer, Moderna, J& J) to the Delta strain, it seems that the elimination of Covid is still a long way off.