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Joined: 6/20/98 Posts: 18045
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T-Cells. B-Cells. That's how.

There are several studies that say herd immunity can be achieved at 20%.

In AZ, 15-16% of people tested havThat’s exactly what Gomes’s work attempts to do. She describes a model in which everyone is equally susceptible to coronavirus infection (a homogeneous model), and a model in which some people are more susceptible than others (a heterogeneous model). Even if the two populations start out with the same average susceptibility to infection, you don’t get the same epidemics. “The outbreaks look similar at the beginning. But in the heterogeneous population, individuals are not infected at random,” she told me. “The highly susceptible people are more likely to get infected first. As a result, the average susceptibility gets lower and lower over time.”

Effects like this—“selective depletion” of people who are more susceptible—can quickly decelerate a virus’s spread. When Gomes uses this sort of pattern to model the coronavirus’s spread, the compounding effects of heterogeneity seem to show that the onslaught of cases and deaths seen in initial spikes around the world are unlikely to happen a second time. Based on data from several countries in Europe, she said, her results show a herd-immunity threshold much lower than that of other models.

“We just keep running the models, and it keeps coming back at less than 20 percent,” Gomes said. “It’s very striking.”e antibodies

(In response to this post by hawg1)

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Posted: 07/31/2020 at 3:33PM


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