COVID-19 Diagnosis: 3 Advanced Tests For Early Detection

COVID-19 Diagnosis: 3 Advanced Tests For Early Detection

COVID-19 is a highly contagious virus that has disrupted daily life worldwide. Protect yourself and others by staying informed, following COVID-19 diagnosis guidelines, and taking necessary precautions. Get vaccinated when possible and continue to practice good hygiene to help prevent the spread of the virus.


3 Most Effective Test for COVID-19 Diagnosis

COVID-19 diagnosis is crucial as it enables early identification, appropriate treatment, isolation measures, contact tracing, and effective public health interventions to control the spread of the virus, safeguarding individuals and communities.


Accurate and timely COVID-19 diagnosis helps in managing cases, providing appropriate medical care, and reducing the burden on healthcare systems, ultimately saving lives.


Here are 3 Most Effective COVID-19 Diagnosis Test:

  1. RT-PCR Test
  2. Antigen test
  3. Antibody test


Covid 19 Diagnosis Test - Drlogy


1. RT-PCR Test

  • The RT-PCR test is the most common COVID-19 diagnosis test.
  • This test detects the genetic material of the SARS-CoV-2 virus in a sample taken from the nose or throat.
  • The RT-PCR test is highly accurate and can detect the virus even if someone is not showing any symptoms of COVID-19.
RT-PCR Test Details
Referred As Reverse transcription polymerase chain reaction test
Test Sample Nasal or throat swab
Preparation No food or drink for 30 minutes before the test
Test Time 4-6 hours
Test Price (INR) 2,500-4,000
Result Value Positive, negative, or inconclusive
Normal Value Negative
Accuracy over 95%

The RT-PCR test is a highly accurate COVID-19 diagnosis test that involves collecting a sample, preparing it for testing, and analyzing it in a lab. Results take 24-48 hours to process, and the test has a high level of accuracy in detecting the virus.


2. Antigen Test

  • Antigen test are rapid diagnostic tests that detect the presence of viral proteins in a nasal or throat swab sample.
  • The test results can be obtained within 15-30 minutes, making it a quick and convenient option for COVID-19 diagnosis test.
  • Antigen tests are less accurate than RT-PCR tests but are still useful for detecting COVID-19 infections in people with symptoms.
Antigen Test Details
Also known as Rapid antigen test
Test sample Nasal swab
Preparation None
Test time 15-30 minutes
Test Price (INR) 400-700
Result value Qualitative
Normal value Negative
Accuracy 50-95%

The Antigen Test for COVID-19, with details on test sample, preparation, time, cost, result value, normal value, and accuracy. The test is faster and cheaper than RT-PCR, but less accurate, providing results within 15-30 minutes.


3. Antibody Test

  • Antibody test are blood tests that look for antibodies that indicate a past infection with the virus that causes COVID-19.
  • These tests are not used for COVID-19 diagnosis, but rather to determine if someone has been previously infected.
  • It's important to note that a positive antibody test does not necessarily mean that someone is immune to COVID-19.
Antibody Test Details
Also known as Serology test
Test sample Blood
Preparation None
Test time 1-3 days
Test Price (INR) 500-900
Result value Quantitative
Normal value Varies
Accuracy 90-99%

The COVID-19 Antibody Test table displays essential information, including accuracy, test time, cost, and result value. It measures the level of antibodies in the blood and determines if a person has previously contracted COVID-19.


COVID-19 Tests Overview

Test Name COVID-19 RT-PCR Test COVID-19 Antigen Test COVID-19 Antibody Test
Also known as NAAT test Rapid antigen test Serology test
Test sample Nasal or throat swab Nasal swab Blood
Preparation None None None
Test time 4-6 hours 15-30 minutes 1-3 days
Test Price (INR) 2,500-4,000 400-700 500-900
Result value Qualitative Qualitative Quantitative
Normal value Negative Negative


Accuracy 95-99% 50-95%


*Test Price, range, and timing may vary as per location, lab type, and procedure.

The table shows info on COVID-19 diagnosis test such as RT-PCR, Antigen, and Antibody, with accuracy, test time, cost, and result value. RT-PCR is most accurate, but slower, while Antigen and Antibody are faster and cheaper but less accurate.


COVID-19 Differential Diagnosis

Similar Diseases Differentiating Factors
Influenza (Flu) Seasonal patterns, different sets of symptoms.
Common Cold Mild symptoms, absence of fever, or severe symptoms.
Allergies Presence of specific allergy symptoms.
Pneumonia Chest X-ray findings, the severity of respiratory symptoms.
Respiratory Syncytial Virus (RSV) Age group affected specific viral testing.

COVID-19 can be differentiated from similar diseases like flu, common cold, allergies, pneumonia, and RSV based on specific symptoms, seasonal patterns, chest X-ray findings, and age group affected. Consulting a healthcare professional is crucial for an accurate COVID-19 diagnosis.


Best Doctor for COVID-19

COVID-19 Specialists Description
Infectious Disease Specialist Specializes in infectious diseases, including COVID-19
Pulmonologist Focuses on respiratory diseases and lung health
Critical Care Specialist Manages severe cases and critical care for COVID-19

An Infectious Disease Specialist is often the go-to doctor for COVID-19 diagnosis and treatment.


7 Interesting Facts COVID-19 Diagnosis

  1. COVID-19 can be asymptomatic, showing no symptoms at all.
  2. COVID-19 diagnosis test methods include PCR, antigen, antibody, and rapid tests.
  3. False negative test results can occur, especially in the early stages.
  4. CT scans can help detect lung abnormalities in COVID-19.
  5. Saliva tests are being developed as a non-invasive COVID-19 diagnosis test option.
  6. Serological tests detect antibodies and determine past infection.
  7. Emerging technologies aim to develop breathalyzer tests for COVID-19.



COVID-19 diagnosis involves a variety of tests including molecular tests, antigen tests, and antibody tests. These tests help determine if a person currently has the virus, has had it in the past, or has developed immunity.



  • COVID-19 Testing: What You Need to Know [1].
  • Coronavirus disease (COVID-19) [2].


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