What should you know about a rapid SARS-CoV-2 antigen test card?

The card uses a nose or throat sample and shows a control mark to indicate that the test has run correctly; a second mark may indicate detected viral antigen. Read the result only within the time stated in the instructions. A negative result means no antigen was detected in that sample at that time, not that infection is impossible. Early illness, poor sampling or low levels of virus can affect detection. COVID-19 symptoms and exposure history remain relevant.

A positive card result should be treated as meaningful while you follow local health advice. A healthcare professional may recommend a COVID-19 Test using another method when the result and clinical picture do not match.

Check the expiry and packaging, wash your hands, and follow every collection and processing step. Do not reuse materials or read a dried card outside the stated window. If positive, limit close contact while seeking guidance, particularly around people at higher risk, and ask about treatment if symptoms have started. If negative but symptoms or exposure concern continues, repeat or obtain professional advice according to local guidance. Do not use the card to delay care for severe symptoms.

Call emergency services for severe trouble breathing, persistent chest pressure, new confusion, inability to wake, or blue or grey lips. Contact a clinician promptly after a positive result if you are pregnant, immunocompromised, elderly, or have a long-term condition. Arrange advice for worsening symptoms, dehydration, or a negative card result that conflicts with strong symptoms or a known exposure.

Was my sample collected and read correctly? Should I repeat the card or have a laboratory COVID-19 Test? How should I protect household members, and do my medical conditions make early treatment or review more important?