hlamyint1964
@hlamyint1964
DW.
herd immunity. ?
3may2020.
https://www.youtube.com/channel/UCknLrEdhRCp1aegoMqRaCZg
https://www.youtube.com/results?search_query=herd+immunity
https://www.youtube.com/watch?v=R4sk6CwmdIA
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herd immunity
noun
noun: herd immunity; plural noun: herd immunities
the resistance to the spread of a contagious disease within a population that results if a sufficiently high proportion of individuals are immune to the disease, especially through vaccination.
"the level of vaccination needed to achieve herd immunity varies by disease"
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Herd Immunity: What It Means for COVID-19 - Healthline
www.healthline.com › health › herd-immunity
Apr 2, 2020 - Herd immunity happens when so many people in a community become immune to an infectious disease that it stops the disease from spreading.
How it works · Stats · Natural immunity · Effectiveness
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