Still struggling with persisting symptoms of Long COVID?
Understand how your immune system is responding across the spectrum of COVID-19 variants with our Long COVID test, highlighting potential therapeutic avenues. Order Your TestCE Marked Technology Platform
UKCA Marked Test
Developed with University of Exeter
The COVID Antibody Spectrum Test (CoAST)
From a single, small blood sample, our Long COVID test provides a window into your immune system and it’s response to SARS-CoV-2 across its different variants, because understanding is the gateway to personalised care and treatment options.
Antibody Quantity
Measures total IgG levels to 15 SARS-CoV-2 variant spike proteins.
Antibody Quality
Determines binding strength (avidity), how well antibodies attach to the virus.
Variant Coverage
Shows which variant waves your immune memory recognises or misses.
Immunity Endotype Identification
Classifies responses into patterns including Compromised, Hyper-immune or Universal.
Note: CoAST is not a test for diagnosing Long COVID. It is a Long Covid test that examines your immune (antibody) response, allowing you to determine your immune endotype. This insight can help guide therapeutic choices and options you may discuss with your physician.
Persistent Virus Hypothesis
Research now suggests that in many Long COVID patients, fragments of SARS-CoV-2, or even live virus, may persist in tissues such as the gut, lymph nodes or brain long after infection.
This Persistent Virus Hypothesis proposes that these viral remnants continue to stimulate the immune system, causing chronic inflammation and symptoms such as fatigue, breathlessness, and brain fog, a mechanism described by Mayo Clinic, Mass General Brigham, Yale Medical School and University College London, and scientific literature (ref 1-3)
Our CoAST Long COVID test helps to explore this biology by quantitatively mapping the presence of and how strongly and effectively your antibodies bind across 15 COVID-19 variants. This reveals immune-response patterns that may indicate viral persistence, auto-immunity, or normal immune recovery.
References:
Chertow D et al. Cell 2022 – Persistence of SARS-CoV-2 in multiple tissues up to 230 days after infection.
Zollner A et al. Gut 2022 – Viral antigen in gut linked to ongoing immune activation.
Shaw A et al. Attomarker / University of Exeter Studies 2023 – Identification of immune response endotypes in Long COVID.
“Our data show that around 60 – 65 % of Long COVID patients exhibit antibody gaps consistent with immune compromise, while ~10 % demonstrate a hyper-immune pattern. Identifying these endotypes may help stratify patients and personalise treatment.”
Professor Andrew Shaw
Founder & Chief Scientist
Attomarker Ltd / University of Exeter
Built on UK science, trusted by clinicians
CoAST was developed at the University of Exeter Science Park by Attomarker’s multidisciplinary team of scientists and engineers.
Conducted on our CE-marked Liscar 6 multiplex platform, the test delivers laboratory-grade precision. Each sample is processed in Attomarker’s UK facility under UKCA / CE quality systems.
Attomarker is part of ongoing research exploring immune endotypes and treatment pathways for Long COVID. Results from CoAST are already providing insights that enable clinicians and patients to examine personalised treatment possibilities.
Insight that makes sense of your immune response
Your secure digital report summarises:
Antibody concentrations for each COVID-19 variant
Binding strength (avidity) values
Your classified endotype (e.g., Immune Gap / Hyper-immune / Universal)
Guidance on what these patterns may mean for further clinical discussion
Simple Process
Fast, painless blood sample collection from home
Order your test online or through a clinical partner. The blood collection kit it then dispatched to your home.
Collect a small blood sample using the included Tasso device.
Return the sample in the pre-paid pack
Receive results securely within 2 weeks
Tasso Blood Collection
“People say, ‘That’s it? I didn’t even feel it!’ – the Tasso device is virtually painless.”
One comprehensive test – no hidden costs
Price includes blood sample collection kit, all postage fees, laboratory testing and secure digital report. No ongoing subscription fees.
Real people. Real insights.
“The Attomarker test was a game-changer – it helped me understand why my symptoms weren’t improving and gave my doctor something concrete to work with.”
“We use the Attomarker test to identify patients showing signs of viral persistence and tailor their care.”
Dr Finlay’s Practice
Available in the UK and selected locations worldwide
The CoAST test is UKCA-marked for use in the United Kingdom, run on the the Liscar 6 CE-marked analytical platform.
For patients outside the UK, including the United States, access may be available under compassionate-use arrangements. Click below to check availability for your location.
FAQs & Reassurance
Is this a diagnostic test?
No. It provides immune profiling information to support clinical discussion.
How is my data protected?
How long do results take?
Can my doctor interpret this with me?
What if I’m in the US?
Start understanding your immune response today – move beyond guesswork.
Gold standard diagnostics, helping to turn science into medicine and replace speculation with investigation.