What are infection diagnostic tests?

Infection diagnostic tests are simple tools designed to detect specific viruses or bacteria in the body. Many modern tests are designed for home use, giving results in minutes without needing to visit a doctor.

Most home respiratory tests work by detecting proteins (antigens) from viruses using a nasal swab. These tests are commonly used for illnesses such as COVID-19, influenza (the flu) and RSV.

Why are they useful?

Rapid testing has become increasingly popular, and for a good reason. Infection diagnostic tests can help you:

• identify the cause of symptoms quickly

• make informed decisions about work, school or social contact

• seek the right treatment sooner

• reduce the spread of infection to others

When should you use one?

You may consider using an infection test if you:

• develop cold or flu-like symptoms

• have been in close contact with someone who is unwell

• need reassurance before visiting vulnerable individuals

• want to confirm whether it’s safe to return to work or school

• need to test a child who cannot fully explain their symptoms

Understanding your results

Most rapid antigen tests provide results within 15 to 20 minutes.

• Positive result: Indicates the likely presence of the infection tested for

• Negative result: May mean no infection is detected, but testing again or monitoring symptoms is often recommended

If symptoms persist or worsen, it’s always best to seek advice from a healthcare professional, regardless of the result.