Individual tests

The fecal occult blood test (FOBT) checks stool samples for hidden (occult) blood. Occult blood in the stool may indicate colon cancer or polyps in the colon or rectum — though not all cancers or polyps bleed. If blood is detected through a fecal occult blood test, additional tests such as a colonoscopy may help determine the source of the bleeding. The fecal occult blood test can only detect the presence or absence of blood — it can't determine what's causing the bleeding.
PCR (Polymerase chain reaction) test is performed by Real Time technique or RT-PCR for short. In this technique, throat swabs are taken to analyze genetic material and detect the presence of the SARS-CoV-2 virus. Real-time RT-PCR testing is currently the most common and accurate method for determining whether a person has the SARS-CoV-2 virus.
SARS-CoV-2 (COVID-19) Ag Rapid Test is a reliable qualitative test for detecting the presence of SARS-CoV-2 in nasal and oropharyngeal samples. This is a simple, easy, fast test, but the sensitivity and specificity are lower than with the Real-time PCR method.