Coronavirus Testing Kits: FAQs

Some frequently asked questions about the PCR and Antibody Coronavirus Testing Kits. Please don’t hesitate to contact us if you don’t find the information you are looking for.

What is the difference between the PCR test and the Antibody test?

The PCR test answers the question “Do I have Covid-19?” and the Antibody test answers the question “Has my body shown a IgG antibody response to Covid-19?’. The PCR test is ideal for those who think they may currently have the virus. The Antibody test is to identify if you have shown an immune response after you have recovered from the symptoms – and should only be used at least 14 days after the first onset of those symptoms.

When should I use these tests?

Use the PCR test if you suspect you currently have Covid-19 or suspect you have recently been exposed to it. The PCR test can detect Covid-19 even if you don’t yet have symptoms.

Use the Antibody test if you believe you have had Covid-19 and are at least 14 days, but ideally 21 days, from the beginning of your symptoms. This is because it takes time for the body’s immune system to respond to the virus and develop IgG antibodies. If you take the test too soon, the antibody may not be detected.

Does a positive test result mean I am immune from future infection?

No. At present, we do not know if recovering from Covid-19 or developing antibodies protects you from reinfection.
According to the World Health Organisation: “There is currently no evidence that people who have recovered from COVID-19 and have antibodies are protected from a second infection.

How will the tests be delivered to me?

All tests are sent out using Royal Mail Special Delivery Next Day Tracked service. Orders to countries outside of the UK will incur extra postage costs, please contact us for more details.

How do I return the sample to you?

The test packages include a UK pre-stamped envelope to be posted back to our laboratory partners. We recommend that UK customers return the test to the laboratory using Royal Mail Special Delivery Next Day Tracked service. If you are returning the test from another country, please contact us for more details and advice before completing the tests.

Are the tests reliable?

Both the PCR and Antibody tests report high sensitivity and high specificity.

Sensitivity tells you how often a test correctly gives a positive result for people who have the condition being tested for. This is also known as the “true positive” rate.

Specificity tells you how often test correctly generates a negative result for people who do not have the condition being tested for. This is also known as the “true negative” rate.

The PCR test has a specificity of 100% and a sensitivity of 100%

The Antibody test has a specificity of 100% and a sensitivity of 97.5%.

Are the tests safe?

Each test is CE marked, which means that the manufacturer has checked that the tests meet EU safety, health or environmental requirements, and comply with EU legislation. These tests are also authorised for distribution by the US FDA (Food and Drug Administration)

Do you offer discounts for the NHS?

We offer discounted tests for NHS frontline staff. Please email  to find out more.

Please don’t hesitate to contact us if you need any further information you are looking for.

To purchase Covid-19 testing kits, please click here: Coronavirus Testing Kits