The image is an infographic in Vietnamese, detailing four steps related to real-time PCR (RT-PCR) testing. Here is a detailed description of each step:

1. **Step 3: Real-time PCR** - This step involves the use of real-time PCR technology to detect the presence of a specific target in a sample. Real-time PCR is a method used to quantify the amount of DNA or RNA in a sample by measuring the amount of fluorescent light emitted from the reaction mixture.

2. **Step 4: Real-time PCR Loại Trú** - This step refers to the process of performing real-time PCR on the sample. It involves the use of real-time PCR equipment and software to analyze the fluorescence signal generated by the reaction.

3. **Step 5: Real-time PCR Xác Định** - This step involves identifying the presence of the target in the sample using real-time PCR. It involves analyzing the fluorescence signal generated by the reaction and determining whether the target is present in the