COVID-19 Tests

COVID-19 Tests


COVID-19 tests allow you to quickly check whether you or a family member may be infected with the coronavirus, helping you make informed decisions about isolation, travel, or seeking medical advice. Available as lateral flow tests for rapid at-home results or PCR kits for laboratory-confirmed accuracy, these tests are suitable for a wide range of situations. Whether you need a home COVID test for peace of mind or a rapid COVID test before visiting a vulnerable person, reliable testing remains an important tool in managing the virus.

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What Are COVID-19 Tests?

COVID-19 tests are diagnostic tools designed to detect the presence of SARS-CoV-2, the virus responsible for COVID-19. They are available in several formats to suit different needs, from quick lateral flow tests that deliver results within 15 to 30 minutes to PCR test kits that are sent to a laboratory for highly accurate analysis. With many people choosing to buy COVID-19 tests online in the UK, these kits have become an accessible and convenient way to confirm infection status without attending a clinic.

Lateral Flow Tests (LFTs)

Lateral flow tests, often referred to as rapid antigen tests, are the most widely used format for home testing. They work by detecting specific proteins produced by the coronavirus, providing a result within approximately 15 to 30 minutes. They are straightforward to use and do not require laboratory analysis, making them ideal for routine or pre-social testing.

PCR Test Kits

PCR (polymerase chain reaction) test kits are considered the gold standard for COVID-19 diagnosis. You collect a sample at home, typically a throat and nasal swab, and return it to a laboratory for analysis. Results are usually available within 24 to 48 hours and are highly accurate, making them suitable for travel requirements or clinical confirmation.

What Are the Symptoms of COVID-19?

Recognising the symptoms of COVID-19 can help you decide whether to use a rapid COVID test or seek further medical advice. Symptoms can range from mild to severe and may develop between two and fourteen days after exposure. If you experience any of the following, testing is strongly recommended:

  • A high temperature or fever
  • A new, continuous cough
  • Loss or change to your sense of smell or taste
  • Shortness of breath or difficulty breathing
  • Fatigue and muscle aches
  • Headache, sore throat, or a blocked or runny nose

If symptoms are severe, particularly difficulty breathing or persistent chest pain, contact NHS 111 or your GP immediately rather than relying solely on home testing.

How Do COVID-19 Tests Work?

The mechanism behind a COVID-19 test varies depending on the type you choose. Understanding how each works can help you select the most appropriate option for your situation.

How Lateral Flow Tests Work

A lateral flow antigen test works by detecting coronavirus proteins in a nasal or throat swab sample. The swab is placed into a liquid solution and then applied to a test strip containing antibodies. If COVID-19 proteins are present, they bind to the antibodies and produce a visible line on the strip, indicating a positive result. These home COVID tests are straightforward to use and provide results in around 15 to 30 minutes.

How PCR Tests Work

A PCR kit detects the genetic material (RNA) of the coronavirus using a laboratory process that amplifies tiny amounts of viral RNA so they can be detected accurately. Because PCR tests identify the virus's genetic code rather than proteins alone, they are significantly more sensitive than lateral flow tests and are less likely to produce a false negative, particularly in the early stages of infection.

Are There Any Side Effects?

COVID-19 test kits are non-invasive diagnostic devices and do not carry the same risks as medications. However, some people may experience mild discomfort when inserting the swab into the nose or throat. Occasionally, the swabbing process can cause brief irritation, sneezing, or watering eyes. If you have any nasal conditions or concerns about self-swabbing, speak to a pharmacist before use.

Who Can Use COVID-19 Tests?

Most COVID antigen tests available in the UK are suitable for adults and children aged two years and over, though age suitability varies by brand — always check the product instructions carefully. Lateral flow tests can generally be self-administered by adults, while children may require assistance from a parent or guardian. Individuals who are immunocompromised, pregnant, or managing underlying health conditions should consult a GP if they receive a positive result or if symptoms persist despite a negative test. If you are unsure which test is right for your circumstances, speak to a pharmacist for guidance.

Why Choose COVID-19 Tests from Cured Pharmacy?

When you buy COVID-19 tests online in the UK through Cured Pharmacy, you benefit from a trusted, regulated source for your testing needs. Our qualified pharmacy team is on hand to answer questions about which test is most appropriate for your situation, whether you need a rapid COVID test for everyday use or a PCR test kit for travel or clinical purposes. We stock a carefully selected range of CE-marked and UKCA-approved tests, offering fast delivery so you can test with confidence and minimal delay. Shopping with a registered UK pharmacy means you can be assured of product quality and professional support throughout.

Written and reviewed by our qualified team

Your safety and success are our highest priorities. Our medical team rigorously evaluates every product and piece of advice we provide, ensuring you receive only the most effective, science-backed solutions available.

Where can I buy COVID-19 tests online in the UK?

You can buy COVID-19 tests online in the UK from registered pharmacies such as Cured Pharmacy. We stock a range of lateral flow and PCR test kits with fast delivery options, so you can receive your tests quickly and test from the comfort of your own home.

Can I buy a COVID-19 test without a prescription?

Yes, most COVID-19 tests available in the UK, including lateral flow tests and home PCR test kits, can be purchased without a prescription. They are available over the counter from registered pharmacies and can be bought online for convenient home delivery.

How accurate are lateral flow tests compared to PCR tests?

PCR tests are considered the most accurate method of detecting COVID-19 and are less likely to produce a false negative. Lateral flow tests are highly convenient and provide rapid results but may be slightly less sensitive, particularly early in an infection. If in doubt, speak to your pharmacist or GP.

How do I use a home COVID test correctly?

Follow the instructions included with your specific test kit carefully. Generally, you will take a swab from your throat and nose, mix it with the provided solution, and apply it to the test strip. Results are typically shown within 15 to 30 minutes. Wash your hands before and after testing.

What should I do if my COVID-19 test is positive?

If your COVID antigen test or PCR result is positive, you should stay at home and avoid contact with vulnerable individuals. Contact NHS 111 or your GP for further advice, especially if your symptoms are worsening or you are in a high-risk group. Inform close contacts so they can also test.

Are COVID-19 tests suitable for children?

Many lateral flow tests and home COVID test kits are suitable for children aged two and over, though adult supervision is recommended. Always check the product packaging for the recommended age range. If your child has symptoms, consider seeking advice from your GP or NHS 111.

How quickly will my COVID-19 tests be delivered?

Cured Pharmacy offers fast UK delivery on all COVID-19 test kits. Delivery times vary depending on the option selected at checkout, but we aim to dispatch promptly so you receive your tests as quickly as possible. Check the product page for current delivery timeframes.

What is the difference between a COVID antigen test and a PCR test?

A COVID antigen test, such as a lateral flow test, detects proteins produced by the coronavirus and delivers results in around 15 to 30 minutes at home. A PCR test detects the virus's genetic material via laboratory analysis, offering greater accuracy and usually returning results within 24 to 48 hours.

Written and reviewed by our qualified team

GPhC Number: 2233073
Tarun Kumar

Reviewed by:

Tarun Kumar

Clinical Leads

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Content last updated: 31 Mar 2025

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