You May be “Fully Vaccinated”, But Are You “Fully Immunized”? Check Your COVID-19 Antibody Level AFTER Vaccination To Make Sure You’re Actually Immune.

COVID-19 vaccine “Breakthrough infections” are happening. It is highly likely that up to 30% of COVID-19 vaccine doses being administered to Americans are not effective at inducinging a proper immune response to SARS-CoV-2. So, if you’re “fully vaccinated” check your COVID-19 blood antibody levels to make sure you’re “immune” too!

I write here, as a physician-immunologist, in direct protest to dangerous and irresponsible public behavior being exhibited by the Biden FDA and CDC in discouraging “fully vaccinated” Americans from ensuring that their COVID-19 shots have induced “full immunity” — in a setting where the agency leadership know that up to 30% of vaccine doses are likely not rendering vaccine recipients adequately immune. This is another colossal error being made by the Biden administration.

FACT: Upwards of 10–20% of Pfizer and Moderna’s COVID-19 mRNA vaccine doses are not inducing a protective immune response.

FACT: Upwards of 20% of J&J’s Adenoviral COVID-19 vaccine doses are not inducing a protective immune response.

FACT: Up to 30% of “fully vaccination” Americans are likely to be either suboptimally “immunized” or not at all.

FACT: COVID-19 breakthrough infections are happening in “fully vaccinated” Americans.

It is highly likely that these COVID-19 “breakthrough infections” are happening in the subset of the vaccinated population NOT adequately “IMMUNIZED” by their “full vaccination”.


The following blood tests from Labcorp are critically important to ensuring that you are immune against COVID-19:

SARS-CoV-2 Spike antigen, IgG (Blood — Labcorp 164055)

SARS-CoV-2 Semi-Quantitative Spike antigen, Ab (Blood — Labcorp 164090)

The Spike IgG test is a qualitative test that will tell you if you have protective IgG antibodies. The presence of IgG antibodies ALWAYS indicates that Spike Antigen specific T-cells have been primed.

The Semi-quantitative Spike antibody test measures the level of protective Spike antibodies in the blood.

In my personal experience, with Labcorp’s Semi-quantitative Spike antibody test the following levels are seen:

  1. Greater than 500 U/ml is seen in persons fully immunized by two effective doses of the Pfizer or Moderna mRNA vaccines.

Also, in my personal experience, COVID-recovered and naturally immune persons will have levels anywhere from 50 to >2500 U/ml. However, almost all naturally immune persons I have evaluated are also positive for SARS-CoV-2 Nucleocapsid antibodies (Blood — Labcorp 164068) — indicating a diverse response to all viral antigens, as expected.

In my opinion, any “fully vaccinated” person with <400 U/ml on Labcorp’s COVID-19 Spike antibody test, ought to get a booster shot.

Any “fully vaccinated” persons with with <0.8 U/ml on Labcorp’s COVID-19 Spike antibody test is NOT immune to COVID-19 and ought to get “fully” re-vaccinated.

NOTE: Blood Antibody Testing is the medical GOLD-STANDARD for determination of immunity against all viruses — including SARS-CoV-2. Furthermore, the Spike Antibody test is one of the main readouts used by all COVID-19 vaccine manufacturers to establish vaccine efficacy.

Please note that on May 19, 2021 the United States Food and Drug Administration issued a guidance discouraging Americans from measuring their COVID-19 antibodies before or after vaccination!

In light of COVID-19 “breakthrough cases” and the up to 30% vaccine inefficacy rate, this guidance from the Biden FDA is a clear and present national health security threat.

This is yet another colossal failure in safe federal action from the Biden administration. THEREFORE, it is up to every “fully vaccinated” American to ensure that their vaccination has led to “FULL IMMUNITY” — in the best interest of their personal safety and our nation’s public health.

I write here in direct protest to dangerous and irresponsible CDC and FDA behavior, I write for the public record — and in defense of US public health.

Hooman Noorchashm MD, PhD

Hooman Noorchashm MD, PhD is a physician-scientist. He is an advocate for ethics, patient safety and women’s health. He and his 6 children live in Pennsylvania.