COVID-19 (SARS-CoV-2) RNA by PCR (Next day)
The COVID-19 PCR test detects active SARS-CoV-2 infection by identifying viral RNA. It is the gold-standard test for diagnosing current COVID-19 infection.
Turnaround time
Results available next day after arrival in lab.
Biomarkers count
1
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Details about COVID-19 (SARS-CoV-2) RNA by PCR (Next day)
What is the COVID-19 (SARS-CoV-2) RNA by PCR test?
The COVID-19 (SARS-CoV-2) RNA by PCR test detects genetic material (RNA) from the SARS-CoV-2 virus. PCR (Polymerase Chain Reaction) is a highly sensitive laboratory method that amplifies viral RNA, allowing detection even at very low levels.
This test confirms active infection, not past exposure or immunity. It is widely used in clinical diagnosis, workplace screening, travel-related testing (where applicable), and infection control.
The next-day turnaround option provides fast and reliable results while maintaining laboratory accuracy.
Why do I need a COVID-19 PCR test?
PCR testing is essential when confirming whether someone is currently infected with COVID-19, especially in situations where accuracy is critical.
You may need a COVID-19 PCR test if you:
- Have COVID-19 symptoms
- Have been in close contact with a confirmed case
- Require confirmation of active infection
- Need testing for work or clinical clearance
- Are immunocompromised or high-risk
- Have symptoms despite a negative rapid test
- Require a definitive diagnostic result
Common symptoms that may prompt testing include:
- Fever or chills
- Cough
- Sore throat
- Loss of taste or smell
- Fatigue
- Muscle aches
- Headache
- Shortness of breath
Benefits of the COVID-19 PCR test
- Gold-standard diagnostic accuracy
Highest sensitivity for active infection. - Detects early infection
Identifies virus before symptoms peak. - Next-day results
Fast turnaround without compromising accuracy. - Clinically recognised worldwide
Standard diagnostic method for COVID-19. - More reliable than rapid tests
Lower false-negative rates. - Suitable for symptomatic and asymptomatic testing
Used in screening and diagnosis. - Supports infection control decisions
Helps protect others. - Accredited laboratory analysis
Ensures test reliability.
Step by step – how the test works
You can access COVID-19 PCR testing UK-wide through two options:
- Clinic appointment
Attend your nearest UK clinic for a swab sample collection by a healthcare professional. - At-home or hotel visit (£60 extra)
A qualified healthcare professional attends your home or hotel to collect the sample.
The sample is analysed in an accredited laboratory, with next-day results delivered securely.
Your results explained
Negative (SARS-CoV-2 RNA not detected)
No viral RNA detected at the time of testing. This suggests no active infection, though very early exposure cannot be completely excluded.
Typical laboratory interpretation:
- SARS-CoV-2 RNA: Not detected
Positive (SARS-CoV-2 RNA detected)
Confirms active COVID-19 infection. Isolation and public health guidance should be followed.
Typical laboratory interpretation:
- SARS-CoV-2 RNA: Detected
Inconclusive / invalid result
The sample may be insufficient or affected by technical factors. Repeat testing may be required.
Results should always be interpreted alongside symptoms and exposure history.
How It Works
Simple steps to get your results
Book Online
Choose your test online and book in seconds. Select your preferred clinic location or home visit option.
Visit or Test at Home
Attend one of our UK or London clinics, arrange a home nurse visit, or use a finger-prick kit where available.
Get Your Results
Your sample is analysed by accredited UK laboratories, with secure results delivered directly to you.
Take control of your health with London Blood Tests
WhatsApp UsHow to Prepare for Your Test
Follow these guidelines for accurate results
Sample Timing
Where possible, attend your blood test between 7am and 12pm. Please wait until any short-term illness or infection has fully resolved before testing. Avoid intense exercise for 24–48 hours beforehand, as this can affect certain markers.
Fasting & Hydration
Fasting is not always required, but some tests may recommend it. If fasting is advised, avoid food for 8–12 hours before your appointment and drink water only. Stay well hydrated, as this helps with sample collection and accuracy.
Medications & Supplements
Continue prescribed medications unless advised otherwise by your clinician. Avoid vitamin, mineral, or biotin supplements for at least 24–48 hours before your test, as these can interfere with results. If you are unsure about any medication or supplement, please let us know before your appointment.
Hormones & Menstrual Cycle
For hormone-related tests, timing within your menstrual cycle may be important. If relevant, follow any specific guidance provided on your test page.
If you have any questions or special circumstances, our team is happy to advise before your appointment.