Quest Diagnostics Post-COVID-19 Basic Test Panel
Type
Blood Testing
Biomarkers
5
Duration
30 min
Results
3 days
Discover if lingering symptoms are potentially due to a post-COVID-19 infection.
Despite having mild or no symptoms while infected with COVID-19, 10-30% of people experience lingering symptoms lasting 4 weeks or longer, commonly known as post-COVID-19 conditions, or long COVID. Some people who have had a severe COVID-19 infection may have symptoms that linger for weeks or months. While the link is still unclear, these long-term effects may increase the risk of diabetes, heart conditions, autoimmune disorders, and neurological conditions. Clinical findings are an important key in evaluating care and potential treatment pathways for those with Long COVID or Post COVID-19 conditions, as stated by the Centers for Disease Control (CDC). This panel of laboratory tests provides information for those with ongoing symptoms. These tests are to help you and your doctor determine if your current symptoms are potentially due to a post-COVID-19 infection or if you have another underlying health problem causing your symptoms.
Key Details
- Type
- Antibody detection (not active infection)
- Fasting Required
- No
- Sample Type
- Blood draw
- Turnaround
- 1–3 business days
- Timing
- Test 2–3 weeks after exposure/vaccination
Who Is This For?
Anyone who wants to check their antibody levels after vaccination or infection. People who suspect they had COVID-19 or another respiratory infection but were never tested. Those interested in monitoring their antibody levels over time. Healthcare workers and others in high-exposure settings.
What's Included
Preparation Required
No fasting required. No special preparation needed. Antibody tests should be performed at least 2–3 weeks after symptom onset or vaccination for accurate results.
Biomarkers Tested
5A protein produced by the liver in response to inflammation. CRP rises rapidly during infection, injury, or inflammatory conditions. It's a general marker — elevated CRP signals inflammation but doesn't pinpoint the source.
The primary screening test for thyroid function. TSH is produced by the pituitary gland to regulate thyroid hormone production. High TSH indicates an underactive thyroid (hypothyroidism), while low TSH suggests an overactive thyroid (hyperthyroidism).
The unbound, active form of the main thyroid hormone T4. Free T4 directly reflects thyroid gland output and is used alongside TSH to diagnose and monitor thyroid disorders.
Essential for nerve function, DNA synthesis, and red blood cell formation. B12 deficiency can cause anemia, neuropathy, fatigue, and cognitive impairment. Common in vegans, vegetarians, older adults, and those taking metformin or acid-reducing medications.
The best indicator of overall vitamin D status. Vitamin D is essential for calcium absorption, bone health, immune function, and mood regulation. Deficiency is extremely common, especially in northern latitudes, and linked to increased disease risk.
+ $6.00 Physician Service Fee
- Category
- Diagnostic
- Sample Type
- Blood draw
- Duration
- 30 min
- Results
- 3 days