Many commentors have recently suggested we may not be able to reach herd immunity and have drawn the conclusion that we shouldn't bother to vaccinate certain sections of society.
Our new @IndependentSage report: (How) can we reach herd immunity? is out:
independentsage.org/wp-content/upl…
Our new @IndependentSage report: (How) can we reach herd immunity? is out:
independentsage.org/wp-content/upl…
I'll summarise briefly here.
First, what is herd immunity?
As immunity builds up it slows he spread of the disease.
Immunity can be acquired through infection or through vaccination.
Vaccination is safer and better.
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First, what is herd immunity?
As immunity builds up it slows he spread of the disease.
Immunity can be acquired through infection or through vaccination.
Vaccination is safer and better.
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Immunity will not be distributed evenly - if there are regions or communities (e.g. children) that have not reached that threshold, then the disease can still spread in these groups.
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In reality herd immunity threshold will vary during the year depending on how easy or hard it is to transmit the disease.
In Winter, for example, it will be easier as people are indoors more - so the threshold of immunity to bring R below 1 will be higher.
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In Winter, for example, it will be easier as people are indoors more - so the threshold of immunity to bring R below 1 will be higher.
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Herd immunity is not “all or nothing”.
The lower we can make R the fewer infections we will incur (and the more consequences of those infections we will avert).
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The lower we can make R the fewer infections we will incur (and the more consequences of those infections we will avert).
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Nominal herd immunity threshold may not be reachable for delta.
This doesn’t mean we should give up and stop vaccinating the unvaccinated.
The more immunity we have the easier it is to control the spread via other means.
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This doesn’t mean we should give up and stop vaccinating the unvaccinated.
The more immunity we have the easier it is to control the spread via other means.
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You can read the full report here: independentsage.org/wp-content/upl…
or come along to the briefing at 13:30 where I'll be giving a brief overview (with pictures!!).
youtube.com/channel/UCqqwC…
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or come along to the briefing at 13:30 where I'll be giving a brief overview (with pictures!!).
youtube.com/channel/UCqqwC…
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