PCR is used for various applications in different fields: Disease Diagnostics: PCR is employed for detecting pathogens, viruses, and genetic markers responsible for diseases, including infectious diseases like COVID-19. Genetic Testing: PCR assists in genetic screening, prenatal testing, and paternity testing by identifying specific DNA sequences. Biological Research: PCR is utilized in genetic research, cloning DNA segments, and studying gene expression and mutations. Forensic Analysis: PCR is essential in forensic investigations to analyze biological evidence, such as DNA profiling in criminal cases.