VOICED : El 30% de las pruebas diagnosticas del coronavirus arrojan falsos negativos

The video discusses the issue of false negatives in COVID-19 testing, highlighting that 3 out of 10 results can be false negatives. This is not due to test unreliability but often due to incorrect technique. The French Laboratory Union corroborates this, noting up to 30% false negatives in diagnosed patients. A case of a teenager who died after two negative tests is mentioned. The RT-PCR technique, which amplifies the virus's genetic material, is explained. Proper sample collection is crucial, requiring swabs to reach the upper pharynx or the back of the throat. Timing of the test is also critical, as virus presence varies with infection stages, potentially leading to incorrect results even with perfect technique.

What is the main reason for the occurrence of false negatives in COVID-19 tests?

• The tests are inherently unreliable.

• Incorrect testing techniques are used.

• The virus is too small to detect.

• The tests are too expensive to perform correctly.

What is the sensitivity of the COVID-19 test when performed correctly?

• 70%

• 85%

• 98%

• 100%

What is the primary method used in RT-PCR testing for COVID-19?

• Detecting antibodies in the blood

• Measuring body temperature

• Amplifying the virus's genetic material

• Counting white blood cells

Why is it necessary to swab the upper pharynx during a COVID-19 test?

• To reach the area where the virus is most likely present

• To ensure the swab is sterile

• To avoid discomfort for the patient

• To collect saliva samples

How can the timing of a COVID-19 test affect its accuracy?

• The virus may not be present in sufficient quantities at certain stages.

• The test is only accurate after symptoms appear.

• The test is more accurate in the morning.

• The test is less accurate during weekends.