Tag Archives: Herd immunity

Majority Are Already Immune Against SARS-CoV-2, by Joseph Mercola

If the majority are already immune, and more become immune every day, we don’t need a vaccine. From Joseph Mercola at lewrockwell.com:

The more data becomes available about SARS-CoV-2, the more obvious it becomes that the response to this pandemic has been grossly overblown. Fatality statistics1,2,3,4,5,6,7 from multiple sources, calculated in a variety of ways, show the risk of dying from COVID-19 is lower than your risk of dying from conventional influenza, at least if you’re under the age of 60.

Overall, the data8,9 also show that the overall all-cause mortality has remained steady this year and doesn’t veer from the norm. In other words, COVID-19 has not killed off more of the population than would have died in any given year anyway.

Several studies also suggest immunity against SARS-CoV-2 infection is far more widespread than anyone imagined, and that the threshold for herd immunity is far lower than previously estimated.

Most Are Already Immune to SARS-CoV-2 Infection  

Studies supporting the claim that widespread immunity against SARS-CoV-2 already exists include: 

Cell, June 202010,11  This study found 70% of samples from patients who had recovered from mild cases of COVID-19 had resistance to SARS-CoV-2 on the T-cell level. Importantly, 40% to 60% of people who had not been exposed to SARS-CoV-2 also had resistance to the virus on the T-cell level.

According to the authors, this suggests there’s “cross-reactive T cell recognition between circulating ‘common cold’ coronaviruses and SARS-CoV-2.” In other words, if you’ve recovered from a common cold caused by a particular coronavirus, your humoral immune system may activate when you encounter SARS-CoV-2, thus rendering you resistant to COVID-19.

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Herd Immunity ‘Ahead of Schedule’, by Joseph Mercola

Wouldn’t it be funny if Covid-19 was gone by the time they came up with a vaccine for it? It could well happen. From Joseph Mercola at lewrockwell.com:

If a novel virus is introduced to a population, eventually enough people acquire natural immunity so that the number of susceptible people declines. When the number susceptible is low enough to prevent epidemic growth, herd immunity is said to have been reached.

In the early days of the COVID-19 pandemic, some experts estimated that 70% of the population or more may need to gain immunity before COVID-19 would be under control. Now, experts are suggesting the percentage may be far lower, and some areas may already have reached what’s known as the herd immunity threshold (HIT).

Scientists: COVID Herd Immunity Threshold Lower Than Thought

According to The New York Times, more than a dozen scientists said in interviews that the HIT for COVID-19 is likely 50% or lower. “If that’s true, then it may be possible to turn back the coronavirus more quickly than once thought,” the Times reported,1 and perhaps without the need for a vaccine.

Herd immunity is calculated using reproductive number, or R-naught (R0), which is the estimated number of new infections that may occur from one infected person.2 R0 of below 1 (with R1 meaning that one person who’s infected is expected to infect one other person) indicates that cases are declining while R0 above 1 suggests cases are on the rise.

It’s far from an exact science, however, as a person’s susceptibility to infection varies depending on many factors, including their health, age and contacts within a community. The initial R0 calculations for COVID-19’s HIT were based on assumptions that everyone has the same susceptibility and would be mixing randomly with others in the community.

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Herd Immunity, by Dr. James Todaro

Because of T-cell immunity, it may only take 10 to 20 percent of a population to be infected with Covid-19 before herd immunity is reach. From Dr. James Todaro at theburningplatform.com:

1/ There is growing evidence that T-cell immunity allows populations to reach herd immunity once only 10-20% are infected with SARS-CoV-2.

This would explain why a highly transmissible virus in densely populated areas peaked at 10-20% infected regardless of lockdowns or masks.

2/ The pervasive misconception is that we have zero immunity against COVID-19. Based on this flawed understanding, epidemiologists projected that herd immunity is not reached until 60-70% are infected.

This is almost certainly wrong.

Of course, the media ignores this research

3/ While antibodies against COVID-19 may only last months, T cell immunity can remain protective for years.

In a study of 23 people who survived SARS in 2003, every single one had memory T cells that recognized the SARS virus 17 years later. (Nature)

4/ Moreover, blood samples from all 23 individuals showed “robust cross-reactivity” against SARS-CoV-2.

This can be called crossover immunity.

Crossover immunity is not limited to just people who were infected with SARS years ago though.

5/ In the same study, in 37 persons with no history of SARS or COVID-19 (negative serology and/or samples taken before COVID-19), over 50% had SARS-CoV-2 specific T cells.

This is not surprising because there are at least 4 strains of coronaviruses that cause the “common cold”.

6/ The above study is not the only one to show this level of cross-reactivity.

In a study from April 2020, in 68 healthy donors never exposed to COVID-19, 34% had T cells that reacted to SARS-CoV-2.

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