We recommend the following tests:
PCR test: Nasopharyngeal swab.
This test detects viral RNA and is the reference technique. If a person has had close contact with a person who tested positive, the PCR test should be done 4 to 7 days after contact to be reliable.
Results in less than 24 hours.
PCR test in saliva: Saliva sample.
This test detects viral RNA and is the reference technique. Collect about 2 mL of saliva in a collection container. Refrain from eating, drinking, chewing gum, drinking coffee, smoking and brushing teeth for half an hour before the test (1 hour if possible).
Results in less than 24 hours.
Antigen test: Nasopharyngeal swab.
This test detects the presence of a viral protein.
Results in 30 minutes once the sample arrives at the laboratory.
Other tests that are on the market:
Saliva antigen test:
Clinical utility: Rapid test to detect SARS-CoV-2 coronavirus antigen (COVID-19) in saliva during the acute phase of infection.
Limitations: a positive result indicates the presence of viral antigens; a negative result does not exclude the possibility of SARS-CoV-2 infection and PCR is recommended.
Influenza A+B antigen test: Nasopharyngeal swab.
As the symptoms of influenza A and B are very similar to those of COVID, we can use these tests to rule out or know what type of disease you have.
Nasopharyngeal swab.
This test detects whether you carry influenza A + B or COVID-19.
Results in 30 minutes once the sample arrives at the lab.
IgG-igM serological test:
Blood collection.
It is not necessary to fast.
This test determines if you have the disease or if you have passed it on and have antibodies. IgM-IgG
If a person has had close contact with a positive person, serology is recommended 7-8 days after contact.
Results in less than 24 hours.