Why it is performed
- Investigate active infection in people with symptoms or recent exposure when testing is indicated.
- Support clinical, employment, travel or isolation decisions under current requirements.
- Distinguish molecular detection from antibody testing: they answer different questions.
How it is performed
A professional collects a swab from the indicated site and places it in the correct transport medium. Identity checks, internal controls and contamination prevention are essential.
Preparation
- Report symptom onset and any recent positive tests.
- Avoid nasal sprays immediately beforehand unless instructed otherwise.
- Check specific requirements for travel or activity certificates, as these can change.
How Askabide processes it
At Askabide
Molecular amplification of one or more SARS-CoV-2 targets, with controls for extraction and reaction validity. Only specimens and targets covered by the assay are reported.
The main analytical phase is performed in the centre’s laboratory, subject to availability and validation.
Results and indicative intervals
Intervals vary by method, analyser, reagent, units, age, sex, pregnancy, menstrual-cycle phase and reference population. The valid interval is the one printed on the laboratory report.
| Parameter or result | Indicative reference | How it is interpreted |
|---|---|---|
| Not detected | Cualitativo | No genetic material was detected above the assay limit. |
| Detected | Cualitativo | Consistent with current or recent infection; interpret with symptoms and timing. |
| Invalid/inconclusive | Repetición posible | Repeat sampling may be needed because of inhibition, insufficient material or control failure. |
Important limitations
- A negative result does not exclude infection if the sample was too early, late or poor quality.
- PCR may remain positive after recovery and does not by itself measure infectiousness.
- Administrative and travel rules change and must be checked on the date of use.