Real-time RT-PCR is a key method for detecting SARS-CoV-2 in COVID-19 patients. However, it has limitations that can lead to false-negative or false-positive results. Factors such as genetic diversity of the virus, primer and probe mismatches, and sampling procedures can affect test accuracy. The virus's genetic evolution and variations in viral load kinetics across different body sites also influence test outcomes. Sampling timing and type are critical, with sputum being more accurate than nasal or throat swabs. False negatives may occur due to amplification inhibitors, insufficient viral load, or improper sample handling. The CDC has developed a diagnostic panel to reduce false positives, emphasizing the importance of negative controls and internal controls in testing. Proper sampling, laboratory practices, and high-quality reagents can improve test accuracy. Real-time RT-PCR results should be interpreted cautiously, especially when clinical features suggest COVID-19. Combining RT-PCR with clinical features and CT imaging can aid in managing outbreaks. Laboratories must follow strict guidelines to ensure reliable results and prevent misdiagnosis. The study highlights the need for careful interpretation of RT-PCR results and the importance of proper sampling and laboratory practices in diagnosing and managing COVID-19.Real-time RT-PCR is a key method for detecting SARS-CoV-2 in COVID-19 patients. However, it has limitations that can lead to false-negative or false-positive results. Factors such as genetic diversity of the virus, primer and probe mismatches, and sampling procedures can affect test accuracy. The virus's genetic evolution and variations in viral load kinetics across different body sites also influence test outcomes. Sampling timing and type are critical, with sputum being more accurate than nasal or throat swabs. False negatives may occur due to amplification inhibitors, insufficient viral load, or improper sample handling. The CDC has developed a diagnostic panel to reduce false positives, emphasizing the importance of negative controls and internal controls in testing. Proper sampling, laboratory practices, and high-quality reagents can improve test accuracy. Real-time RT-PCR results should be interpreted cautiously, especially when clinical features suggest COVID-19. Combining RT-PCR with clinical features and CT imaging can aid in managing outbreaks. Laboratories must follow strict guidelines to ensure reliable results and prevent misdiagnosis. The study highlights the need for careful interpretation of RT-PCR results and the importance of proper sampling and laboratory practices in diagnosing and managing COVID-19.