2 thoughts on “Definitions of “herd”

  1. Science be damned says:

    Achieving herd immunity to COVID-19 is an impractical public health strategy, according to a new model developed by University of Georgia scientists. The study recently appeared in Proceedings of the National Academy of Sciences. https://www.eurekalert.org/pub_releases/2020-09/uog-hia092220.php
    Controlling COVID-19 has presented public health policymakers with a conundrum:
    How to prevent overwhelming their health care infrastructure, while avoiding major societal disruption? Debate has revolved around two proposed strategies. One school of thought aims for “suppression,” eliminating transmission in communities through drastic social distancing measures, while another strategy is “mitigation,” aiming to achieve herd immunity by permitting the infection of a sufficiently large proportion of the population while not exceeding health care capacity.
    “Transmission dynamics reveal the impracticality of COVID-19 herd immunity strategies” The Proceedings of the National Academy of Sciences (PNAS), the official journal of the National Academy of Sciences (NAS) https://www.pnas.org/content/early/2020/09/21/2008087117
    Meanwhile: “Massive genetic study shows coronavirus mutating and potentially evolving amid rapid U.S. spread : The largest U.S. genetic study of the virus, conducted in Houston, shows one viral strain outdistancing all of its competitors, and many potentially important mutations.” (Washington Post 9/23/20) https://www.washingtonpost.com/health/2020/09/23/houston-coronavirus-mutations/?arc404=true

  2. John Brunner says:

    “The hungry sheep look up, and are not fed,
    But, swoll’n with wind and the rank mist they draw,
    Rot inwardly, and foul contagion spread;
    Besides what the grim wolf with privy paw
    Daily devours apace, and nothing said,
    But that two-handed engine at the door
    Stands ready to smite once, and smite no more”.
    Lycidas By John Milton (1638)

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