The more one researches the immune system, the more one realizes how amazing and complex it is. Doctors and scientists discover new things about our incredible immune systems all the time, but no one can explain or understand everything about it. Most everyone used to agree that natural immunity to a disease after contracting that disease gives live-long immunity . . . and that vaccines for the same disease don’t usually give that same robust response. But now there seems to be a controversy over whether Covid-19 natural immunity is as good (or better) that the vaccine, or even that the vaccine is better than natural immunity – and whether previously infected people should be required to take the vax? This post will explore natural immunity and the studies showing how robust it is. This is an important topic considering that natural immunity is being ignored in the USA in favor of a vaccine mandate that ignores natural immunity.

123 Research Studies Affirm Naturally Acquired Immunity to Covid-19: Documented, Linked, and Quoted

I recently discovered The Brownstone Institute and have been impressed with their scholarly but accessible articles that “hope to shed light on a path to recovery from the devastating collateral damage [of lockdowns and mandates], while providing a vision for a different way to think about freedom, security, and public life.” This post will quote from the above linked article, but I recommend that you read the whole thing, including all of the studies quoted.

“We should not force COVID vaccines on anyone when the evidence shows that naturally acquired immunity is equal to or more robust and superior to existing vaccines. Instead, we should respect the right of the bodily integrity of individuals to decide for themselves. Public health officials and the medical establishment with the help of the politicized media are misleading the public with assertions that the COVID-19 shots provide greater protection than natural immunity.” . . .

. . . “Immunology and virology 101 have taught us over a century that natural immunity confers protection against a respiratory virus’s outer coat proteins, and not just one, e.g. the SARS-CoV-2 spike glycoprotein. There is even strong evidence for the persistence of antibodies. Even the CDC recognizes natural immunity for chicken-pox and measles, mumps, and rubella, but not for COVID-19.”

“The vaccinated are showing viral loads (very high) similar to the unvaccinated (Acharya et al. and Riemersma et al.), and the vaccinated are as infectious. Riemersma et al. also report Wisconsin data that corroborate how the vaccinated individuals who get infected with the Delta variant can potentially (and are) transmit(ting) SARS-CoV-2 to others (potentially to the vaccinated and unvaccinated).” . . .

. . . “Moreover, existing immunity should be assessed before any vaccination, via an accurate, dependable, and reliable antibody test (or T cell immunity test) or be based on documentation of prior infection (a previous positive PCR or antigen test). Such would be evidence of immunity that is equal to that of vaccination and the immunity should be provided the same societal status as any vaccine-induced immunity. This will function to mitigate the societal anxiety with these forced vaccine mandates and societal upheaval due to job loss, denial of societal privileges etc. Tearing apart the vaccinated and the unvaccinated in a society, separating them, is not medically or scientifically supportable.”

. . . “This chart (pdf) is the most updated and comprehensive library list of 81 of the highest-quality, complete, most robust scientific studies and evidence reports/position statements on natural immunity as compared to the COVID-19 vaccine-induced immunity and allow you to draw your own conclusion.” You can also read through this chart at the linked article. 13 of the 81 reports are reproduced below:

• 8) Good news: Mild COVID-19 induces lasting antibody protection, Bhandari, 2021
  • “Months after recovering from mild cases of COVID-19, people still have immune cells in their body pumping out antibodies against the virus that causes COVID-19, according to a study from researchers at Washington University School of Medicine in St. Louis. Such cells could persist for a lifetime, churning out antibodies all the while. The findings, published May 24 in the journal Nature, suggest that mild cases of COVID-19 leave those infected with lasting antibody protection and that repeated bouts of illness are likely to be uncommon.”
• 12) Quantifying the risk of SARS‐CoV‐2 reinfection over time, Murchu, 2021
  • “Eleven large cohort studies were identified that estimated the risk of SARS‐CoV‐2 reinfection over time, including three that enrolled healthcare workers and two that enrolled residents and staff of elderly care homes. Across studies, the total number of PCR‐positive or antibody‐positive participants at baseline was 615,777, and the maximum duration of follow‐up was more than 10 months in three studies. Reinfection was an uncommon event (absolute rate 0%–1.1%), with no study reporting an increase in the risk of reinfection over time.”
• 13) Natural immunity to covid is powerful. Policymakers seem afraid to say so, Makary, 2021
  • Makary writes “it’s okay to have an incorrect scientific hypothesis. But when new data proves it wrong, you have to adapt. . . . More than 15 studies have demonstrated the power of immunity acquired by previously having the virus. A 700,000-person study from Israel two weeks ago found that those who had experienced prior infections were 27 times less likely to get a second symptomatic covid infection than those who were vaccinated. This affirmed a June Cleveland Clinic study of health-care workers (who are often exposed to the virus), in which none who had previously tested positive for the coronavirus got reinfected. The study authors concluded that “individuals who have had SARS-CoV-2 infection are unlikely to benefit from covid-19 vaccination.” . . .
• 31) Researchers find long-lived immunity to 1918 pandemic virus, CIDRAP, 2008; and the actual 2008 NATURE journal publication by Yu
  • “A study of the blood of older people who survived the 1918 influenza pandemic reveals that antibodies to the strain have lasted a lifetime and can perhaps be engineered to protect future generations against similar strains…the group collected blood samples from 32 pandemic survivors aged 91 to 101..the people recruited for the study were 2 to 12 years old in 1918 and many recalled sick family members in their households, which suggests they were directly exposed to the virus, the authors report. The group found that 100% of the subjects had serum-neutralizing activity against the 1918 virus and 94% showed serologic reactivity to the 1918 hemagglutinin.” . . .
• 34) Op-Ed: Quit Ignoring Natural COVID Immunity, Klausner, 2021
  • “Epidemiologists estimate over 160 million people worldwide have recovered from COVID-19. Those who have recovered have an astonishingly low frequency of repeat infection, disease, or death.”
• 40) SARS-CoV-2 Natural Antibody Response Persists for at Least 12 Months in a Nationwide Study From the Faroe Islands, Petersen, 2021
  • “The seropositive rate in the convalescent individuals was above 95% at all sampling time points for both assays and remained stable over time; that is, almost all convalescent individuals developed antibodies… results show that SARS-CoV-2 antibodies persisted at least 12 months after symptom onset and maybe even longer, indicating that COVID-19-convalescent individuals may be protected from reinfection.”
• 50) Prior SARS-CoV-2 infection is associated with protection against symptomatic reinfection, Hanrath, 2021
  • “We observed no symptomatic reinfections in a cohort of healthcare workers…this apparent immunity to re-infection was maintained for at least 6 months…test positivity rates were 0% (0/128 [95% CI: 0–2.9]) in those with previous infection compared to 13.7% (290/2115 [95% CI: 12.3–15.2]) in those without (P<0.0001 χ² test).” 
• 53) NIH Director’s Blog: Immune T Cells May Offer Lasting Protection Against COVID-19, Collins, 2021
  • “Much of the study on the immune response to SARS-CoV-2, the novel coronavirus that causes COVID-19, has focused on the production of antibodies. But, in fact, immune cells known as memory T cells also play an important role in the ability of our immune systems to protect us against many viral infections, including—it now appears—COVID-19.An intriguing new study of these memory T cells suggests they might protect some people newly infected with SARS-CoV-2 by remembering past encounters with other human coronaviruses. This might potentially explain why some people seem to fend off the virus and may be less susceptible to becoming severely ill with COVID-19.”
• 54) Ultrapotent antibodies against diverse and highly transmissible SARS-CoV-2 variants, Wang, 2021
  • “Our study demonstrates that convalescent subjects previously infected with ancestral variant SARS-CoV-2 produce antibodies that cross-neutralize emerging VOCs with high potency…potent against 23 variants, including variants of concern.” 
• 55) Why COVID-19 Vaccines Should Not Be Required for All Americans, Makary, 2021
  • “Requiring the vaccine in people who are already immune with natural immunity has no scientific support. . . . to argue dogmatically that they must get vaccinated has zero clinical outcome data to back it. As a matter of fact, we have data to the contrary: A Cleveland Clinic study found that vaccinating people with natural immunity did not add to their level of protection.”
• 68) Had COVID? You’ll probably make antibodies for a lifetime, Callaway, 2021
  • “People who recover from mild COVID-19 have bone-marrow cells that can churn out antibodies for decades…the study provides evidence that immunity triggered by SARS-CoV-2 infection will be extraordinarily long-lasting.” 
• 71) Naturally enhanced neutralizing breadth against SARS-CoV-2 one year after infection, Wang, 2021
  • “A cohort of 63 individuals who have recovered from COVID-19 assessed at 1.3, 6.2 and 12 months after SARS-CoV-2 infection…the data suggest that immunity in convalescent individuals will be very long lasting.”
• 81) A population-based analysis of the longevity of SARS-CoV-2 antibody seropositivity in the United States, Alfego, 2021
  • “To track population-based SARS-CoV-2 antibody seropositivity duration across the United States using observational data from a national clinical laboratory registry of patients tested by nucleic acid amplification (NAAT) and serologic assays… specimens from 39,086 individuals with confirmed positive COVID-19…both S and N SARS-CoV-2 antibody results offer an encouraging view of how long humans may have protective antibodies against COVID-19, with curve smoothing showing population seropositivity reaching 90% within three weeks, regardless of whether the assay detects N or S-antibodies. Most importantly, this level of seropositivity was sustained with little decay through ten months after initial positive PCR.”
• 87)  Karl Friston: up to 80% not even susceptible to Covid-19, Sayers, 2020
  • “Results have just been published of a study suggesting that 40%-60% of people who have not been exposed to coronavirus have resistance at the T-cell level from other similar coronaviruses like the common cold…the true portion of people who are not even susceptible to Covid-19 may be as high as 80%.”
• 106)  S Protein-Reactive IgG and Memory B Cell Production after Human SARS-CoV-2 Infection Includes Broad Reactivity to the S2 Subunit, Nguyen-Contant, 2021
  • “Most importantly, we demonstrate that infection generates both IgG and IgG MBCs against the novel receptor binding domain and the conserved S2 subunit of the SARS-CoV-2 spike protein. Thus, even if antibody levels wane, long-lived MBCs remain to mediate rapid antibody production. Our study results also suggest that SARS-CoV-2 infection strengthens pre-existing broad coronavirus protection through S2-reactive antibody and MBC formation.”
• 123)  Protective immunity after recovery from SARS-CoV-2 infection, Kojima, 2021
  • “It important to note that antibodies are incomplete predictors of protection. After vaccination or infection, many mechanisms of immunity exist within an individual not only at the antibody level, but also at the level of cellular immunity. It is known that SARS-CoV-2 infection induces specific and durable T-cell immunity, which has multiple SARS-CoV-2 spike protein targets (or epitopes) as well as other SARS-CoV-2 protein targets. The broad diversity of T-cell viral recognition serves to enhance protection to SARS-CoV-2 variants, with recognition of at least the alpha (B.1.1.7), beta (B.1.351), and gamma (P.1) variants of SARS-CoV-2. Researchers have also found that people who recovered from SARS-CoV infection in 2002–03 continue to have memory T cells that are reactive to SARS-CoV proteins 17 years after that outbreak. Additionally, a memory B-cell response to SARS-CoV-2 evolves between 1·3 and 6·2 months after infection, which is consistent with longer-term protection.”

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International Alliance of Physicians and Medical Scientists – Global Covid Summit Physicians Declaration II

13,000 physicians and medical scientists recently published the Rome Covid Declaration, to alert citizens to the deadly consequences of disrupting life-saving treatment and suppressing open scientific discussion. Follow the link above to see some of the names of the qualified doctors and scientists who were co-signers of the declaration.

RESOLVED, THAT NATURALLY IMMUNE PERSONS RECOVERED FROM SARS-CoV-2 SHALL NOT BE SUBJECT TO ANY RESTRICTIONS OR VACCINE MANDATES (view supporting evidence)

Natural immunity is the most protective, and longest-lasting solution against the development of COVID-19 disease and its more serious outcomes.

Naturally immune persons are at the lowest risk of transmission, thus should not be subject to travel, professional, medical or social restrictions.

Natural immunity provides the best source of herd immunity, a condition necessary for eradicating the Covid virus.

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Why I’m Suing Over My Employer’s Vaccine Mandate

I have natural immunity, so there’s no justification for a coercive violation of my bodily autonomy. by Todd J. Zywicki, George Mason University Foundation Professor of Law. Here he describes his own experience of having his employer refuse to acknowledge his recovery from covid as equivalent to vaccination and includes many studies to back up his claims:

“During the spring of 2020 I contracted and recovered from Covid-19, which I later confirmed through a positive antibody test. Multiple positive antibody tests have since confirmed that I continue to have a robust level of immune protection.” . . .

“Clinical studies from Israel, the Cleveland Clinic, England and elsewhere have demonstrated beyond a doubt that natural immunity to SARS-CoV-2 provides robust and durable protection against reinfection comparable to or better than that provided by the most effective vaccines. Examining the evidence this May, the World Health Organization concluded: “Current evidence points to most individuals developing strong protective immune responses following natural infection with SARS-CoV-2.””

“Protection from natural immunity may even exceed that of the less effective Johnson & Johnson vaccine, which according to the CDC demonstrated only 66.3% effectiveness at preventing infection in clinical trials. . . .”

“It isn’t merely unnecessary for me to get the shot. It’s potentially dangerous. Covid-recovered individuals have been mostly excluded from the vaccine clinical trials, rendering any claims about the purported safety for this group largely speculative. Moreover, clinical evidence has suggested that Covid survivors suffer more-frequent and more-serious side effects from vaccination than those who have never been infected. [Study 1, Study 2, Study 3, Study 4]”

“The onslaught of the Delta variant in recent weeks has reinforced the lessons about the robust protection afforded by natural immunity. Unlike the current vaccines, which are designed to target the spike protein of the virus, natural immunity recognizes the entire complement of SARS-CoV-2 proteins and thus protects against a greater array of variants.”

“Thus even as vaccine breakthrough infections multiply around the world, natural immunity is robust to the Delta and other variants. With respect to the Gamma variant, a recent analysis of an outbreak among a small group of mine workers in French Guiana found that 60% of fully vaccinated miners suffered breakthrough infections compared with zero among those with natural immunity.”

“And whereas the vaccine’s protection may wane faster than expected, the latest estimates on the durability of natural immunity stretch to at least 11 months, the duration of most follow-up studies. Some 16 months after contracting Covid I am still testing positive for antibodies. In fact, researchers have discovered that the antibodies produced by natural infection continue to evolve to generate “increasingly broad and potent antibodies that are resistant to mutations” compared with the more static “antibodies elicited by vaccination.”” . . .

. . . “for those of us who have acquired natural immunity, vaccination provides none of the benefits of vaccination with all of the costs [and the risks of the vaccine].”

It’s hard to understand why the CDC is ignoring natural immunity in regards to Covid. Everyone says “follow the science” but in this case the CDC and the FDA do not seem to be following “the science”.

A Neurosurgeon in Washington reports

A blog I follow (Powerlineblog) heard from an occasional correspondent (a neurosurgeon in Washington) who wrote:

There are a fair amount of good clinical studies now published that support the idea that natural immunity is at least equivalent (and better in some instances) than vaccinated immunity. Nonetheless, private and public enterprises are enforcing the mandate without regard to immune status. At least one very good study performed in the UK, and specific to the Delta variant, found that previously infected health care workers who subsequently got vaccinated, were 3.5x more likely to get a symptomatic breakthrough infection with Delta, than if they were not vaccinated at all. This highlights a possible harm to individuals who were previously infected, who are coerced into receiving the vaccine.

A separate, very large study at the Cleveland Clinic of over 50,000 individuals found that no (0%) of individuals previously infected with COVID, were re-infected regardless of vaccination. However, the CDC guidelines do not address these studies — and rely on the intuition that the benefit of vaccines outweigh the risks, even in previously infected individuals.

There are many physicians and scientists with expertise in the relevant fields and with actual clinical experience in treating covid patients whose views differ from the “accepted” views and are being suppressed, censured and cancelled by the press and social media giants. Many of them have successfully treated covid patients with early treatment, negating the necessity of the vaccines and their risky side-effects.

Thank you for reading this research and data about natural immunity to Covid. There are a lot of misperceptions about natural immunity and vaccination, and I hope this post helps inform your views and question why natural immunity is not being accepted in the United States as equal or better than the mandated vaccines.