COVID-19 antibody and PCR testing program

Serological and PCR Testing for SARS-CoV-2. A Prospective Study Assessing Infection, Immunity, and Asymptomatic Carriage of COVID-19

Observational Richmond Pharmacology Limited · NCT04404062

This project uses PCR and blood antibody tests to find current or past COVID-19 infection in people aged 5 to 70, including those with and without symptoms.

Quick facts

Study typeObservational
Enrollment2500 (estimated)
Ages5 Years to 70 Years
SexAll
SponsorRichmond Pharmacology Limited Industry-sponsored
Locations1 site (London, London)
Trial IDNCT04404062 on ClinicalTrials.gov

What this trial studies

The program combines membrane-based immunoassays, quantitative IgG/IgM antibody measurements, and PCR testing on blood and respiratory samples to identify active infection and past exposure. Participants are screened longitudinally so antibody levels and PCR status can be tracked over time to estimate duration of immune response and asymptomatic carriage. Tests are applied to workers and their families, including children, with in-house PCR methods verified by an independent laboratory. Data will be used to support early detection of new infection waves and to help develop a quantitative laboratory reference for SARS-CoV-2 antibodies.

Who should consider this trial

Good fit: Ideal candidates are people aged 5 to 70 who can attend the London site and are willing to provide blood and swab samples and comply with follow-up visits.

Not a fit: People outside the 5–70 age range or those seeking experimental treatments rather than diagnostic information are unlikely to receive direct clinical benefit from participation.

Why it matters

Potential benefit: If successful, the testing could help identify who is currently infectious or has developed antibodies, aiding infection-control decisions and monitoring vaccine responses.

How similar studies have performed: PCR and serology approaches are widely used and have reliably detected active infections and prior exposure, although quantitative antibody reference methods are still being refined.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Male or female aged 5 to 70 years.
* An understanding, ability, and willingness to fully comply with the project procedures and restrictions.

Exclusion Criteria:

* Not applicable.

Where this trial is running

London, London

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.
Conditions COVID-19
Last reviewed 2026-06-15 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.