eric76 said:
NASAg03 said:
eric76 said:
Old Buffalo said:
NASAg03 said:
with some health officials stating that herd immunity isn't possible without a vaccine
Following the science, I see....
Herd immunity refers to actual herds that are kept apart from other herds. It doesn't apply to modern human society where people intermix frequently.
You mean like a small religious community that isolates themselves from the rest of society and regularly interacts internally?
Maybe if they were on an island completely cut off from the world. Even then, all it might take is one infected person visiting the island.
For herd immunity to work, it would have to be very improbable that such a visitor would interact with someone who was not immune from having had the disease.
You don't need complete isolation for herd immunity to occur - pockets of various groups can achieve herd immunity depending on how they interact while the society at large remains at risk. That's what happened with the Amish.
After a few months of lockdown, they removed all NPIs and lived life normally. As such, many Amish came down with covid. Now, there are no cases seen at the hospitals because transmission as stopped.
The majority of my friend group here in Denver has had covid. As such, the likelihood that someone at risk gets it from us is lower because the majority of us won't transmit it to someone who doesn't have immunity. 4 of us went hiking (all who had legit cases of covid-19 with positive results) with someone who wasn't vaccinated and didn't have antibodies. She immediately felt comfortable and eliminated her own NPIs because she was protected with an immune herd during that 8hrs of time. Thankfully she actually believed in science.
That's how herd immunity works.
Quote:
Herd immunity (also called herd effect, community immunity, or population immunity) is a form of indirect protection from infectious disease that can occur with some diseases when a sufficient percentage of a population has become immune to an infection, whether through vaccination or previous infections, thereby reducing the likelihood of infection for individuals who lack immunity.[url=https://en.wikipedia.org/wiki/Herd_immunity#cite_note-pmid21427399-1][1][/url][url=https://en.wikipedia.org/wiki/Herd_immunity#cite_note-gordis-2][2][/url][url=https://en.wikipedia.org/wiki/Herd_immunity#cite_note-3][3][/url] Immune individuals are unlikely to contribute to disease transmission, disrupting chains of infection, which stops or slows the spread of disease.[url=https://en.wikipedia.org/wiki/Herd_immunity#cite_note-merrill-4][4][/url] The greater the proportion of immune individuals in a community, the smaller the probability that non-immune individuals will come into contact with an infectious individual.[url=https://en.wikipedia.org/wiki/Herd_immunity#cite_note-pmid21427399-1][1][/url]
https://en.wikipedia.org/wiki/Herd_immunity
