ImmunoPass Neutralizing Antibody Test

Neutralizing Antibody Rapid Test


Easy to UseEasy to Use

Results in 10 MinutesRapid Results in 10 Minutes

Requires No Additional EquipmentRequires No Additional Equipment

Semiquantitative ResultsQualitative Results

The ImmunoPass™ COVID-19 Neutralizing Antibody Rapid Test detects functional, virus-neutralizing antibodies (NAbs) within 10 minutes, unlike traditional neutralization tests which take days. The ImmunoPass™ test kit does not utilize live biological materials and does not require the strict biosafety protocol associated with live virus samples.


100% Sensitivity


97.7% Specificity


ImmunoPass Science

ImmunoPass™ Science

The ImmunoPass™ Neutralizing Antibody (NAb) test demonstrates the ability of antibodies to BLOCK the binding of the RBD on spike protein to ACE2, the cellular receptor. RBD is the principle neutralizing determinant for SARS-CoV-2.

Why Are Neutralizing Antibodies Important?

  • NEUTRALIZING ANTIBODIES BLOCK the COVID virus, providing immunity protection against infection and re-infection
  • NEUTRALIZING ANTIBODIES inactivate the COVID-19 virus and are Associated with Immunity
  • NON-NEUTRALIZING ANTIBODIES do not block or neutralize COVID, thus provide no protection against re-infection.

How are Neutralizing Antibodies Measured?

  • The ImmunoPass™ Neutralizing Antibody tests measures titer levels, which indicate the amount of neutralizing antibodies in a blood sample.
  • Titers are measured by ratios, where a higher ratio (1:320 compared to 1:8) indicates higher titer levels. A higher titer level means that the blood can be diluted many times and still produce a virus-neutralizing response.

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Use Cases

Back to Work and Back to School

  • Test employees to determine NAb levels, providing insight into their immunity effectiveness
  • Test teachers and students to monitor their level of immune protection
  • Longitudinal monitoring of NAbs to track changes in immunity protection

Plasma Donation / Plasma Prioritization – Save a life Campaign

  • Identification of donors with high levels of NAbs
  • Utilization of high quality plasma to enhance patient care
  • Repetitive NAb screening to provide longitudinal tracking of waning or persistent titers

Vaccine Efficacy

  • Identification of vaccine efficacy in patients based on their responding NAb levels.
  • Continued repetitive NAb screening to track waning or persistent titers to understand length of vaccine effectiveness and provide insight into the need for additional vaccine booster.

Military Mission Readiness

  • Identification of personnel with high levels of NAbs to enable mission readiness
  • Longitudinal monitoring of waning or persistent NAb titers to identify at-risk military personnel

Intended Use

The ImmunoPass™ COVID-19 Neutralizing Antibody Rapid Test is a lateral flow assay intended for qualitative detection of neutralizing antibodies against SARS-CoV-2 Spike Receptor Binding Domain (RBD) protein in human fingerstick blood. The ImmunoPass is intended for use as an aid in identifying individuals with an adaptive immune response to SARS-CoV-2, indicating recent or prior infection. The ImmunoPass should not be used to diagnose or exclude acute SARS-CoV-2 infection.

ImmunoPass Neutralizing Antibody Test

For informational purposes only. Testing is limited to laboratories and patient care settings operating under a high complexity CLIA Certificate.

Test Instructions

Allow the kit components to reach room temperature (15-30°C) prior to testing.

  • Place the test cassette on a clean and level surface. Remove the top label. Use the micropipette to collect a 15µl sample, filling to the fill line, designated by the third plastic tick mark from the tip. Dispense 15µl of specimen to the sample port of the test cassette, then add 2 drops of buffer to the sample port and start the timer.
  • Wait for the colored line(s) to appear. The test result should be read at 10 minutes. Do not interpret the result after 30 minutes. If the test does not respond within 1-2 minutes, this may indicate that an air bubble has formed within the buffer solution. If this occurs, add 1 additional drop of buffer solution.
ImmunoPass - Step 11

Clean finger with the Alcohol Wipe

ImmunoPass - Step 22

Pierce the side of a finger with the spring-loaded lancet

ImmunoPass - Step 3 3

Use the Capillary Pipette to collect sample. Fill to the third tick mark.

ImmunoPass - Step 4 4

Expel sample into test port. Wait 15 seconds to allow the blood to be absorbed.

ImmunoPass - Step 5 5

Add 2 drops of Buffer Solution. A third drop may be required if the test does not respond after 1 minute. Read results at 10 minutes.