Herd immunity is when a virus can no longer spread easily because enough people are immune to it. That lowers the chances of the virus jumping from person to person and reaching those who haven't been infected yet.
People can become immune to certain viruses after surviving infection or being vaccinated. Typically, at least 70% of a population must be immune to achieve herd immunity. But how long immunity lasts varies depending on the virus, and it's not yet known how long COVID-19 survivors might have that protection.
How easily the virus spreads also plays a key role.
Say, for example, someone who's infected with a particular virus typically transmits it to two others. The chances of that person passing it on to others would be lower if half the population is already immune, said Dr. Walter Orenstein, a vaccine expert at Emory University.
The odds of transmission fall further if even more of the population is immune. That could cause new infections to die out.
But if a virus is more infectious, a higher percentage of people would need to have immunity to stop the spread and achieve herd immunity, Orenstein said.
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ReplyDeleteSweden tried it. And it was a complete failure.
ReplyDeleteThey only had 2.5 percent more people test positive (7.5) for antibodies than countries that locked down (average of 5 percent) and had as many deaths and more in some cases per capita.
It matters not in an uncontrollable society.If for instance everyone is going to socially mingle and not follow any protocol herd immunity will have to take over or everyone on our planet will die.Then some alien species will come along and wonder what killed us all.
ReplyDeleteIt's already done folks. I had it mid January before testing was done. We all have had it in my neighborhood.
ReplyDeleteThe idea is possible, after watching the mindless fools taking knees and washing feet it showed me people are like cattle.
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