COVID-19 Close-Contact Exposure Assessment — Last 2 Weeks
Records whether you had close contact with someone with COVID-19 during the previous 2 weeks to help assess exposure risk.
A recent close-contact exposure may increase the chance of COVID-19 but does not by itself mean you are infected.
Key facts at a glance
- LOINC
- 99348-5
- Short code
- CLOSECONTACTWITHCOVID19INLAST2W
- Synonyms
- —
- Category
- liver
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Ref low
- 10
- Ref high
- 40
- Critical range
- — – 500 N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- CPT
- 84484
- SNOMED
- 302774002
- Specimen volume
- 5 mL
- Stability
- Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
- Hemolysis max
- 500
- Lipemia max
- 1000
- Icterus max
- 500
- TAT
- 4–24 hours
- Order
- routine
What is this test?
This is an exposure-history assessment rather than a standard laboratory test. It documents close contact with a person who had or was suspected of having COVID-19 during the previous 2 weeks.
Why might I need this test?
A clinician, workplace, school, travel program, or public-health service may ask about recent exposure to guide symptom monitoring, testing, and temporary precautions. A recorded exposure does not confirm infection.
How is the test performed?
Information is usually collected through a questionnaire or interview about when the contact occurred, how close you were, and whether protective measures were used. If infection is possible, a separate COVID-19 test may be recommended.
How do I prepare for the test?
No special preparation is needed for the exposure assessment. Think back to recent close contacts, including household members, coworkers, and others with whom you spent substantial time indoors.
Reference range
Adult: 10-40 U/LN/A
No special preparation required. Avoid fatty meals before the test if possible.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
A positive exposure assessment means a qualifying close contact was reported, not that you have COVID-19. Recent close contact can increase infection risk, especially with prolonged indoor contact and little or no protection. Symptoms or a positive viral test are needed to determine whether infection occurred.
Short name
Recent COVID-19 close contact
Frequently asked questions
Does a recent close-contact exposure mean I have COVID-19?
What should I do after being exposed to COVID-19?
When can I be around others without potentially exposing them?
Sources
- 1
- 2Lab Tests OnlineSource
- 3
Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.
This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.
If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.
Medically reviewed by WellAlly Editorial Team Last reviewed August 17, 2026. · Read our editorial policy