The image is a page from a book or document, likely related to medical or scientific topics. The text on the page is divided into four numbered sections, each containing a brief description of different medical procedures or techniques.

1. **Section 3**: This section discusses "Trung hcp xac dinh." It mentions that this procedure involves the use of Realtime PCR (Real-time polymerase chain reaction) in the diagnosis of diseases.
2. **Section 4**: This section talks about "Trung hcp loai tru." It describes the use of Realtime PCR in the diagnosis of diseases.
3. **Section 5**: This section focuses on "Trung hcp xac dinh" again, but it seems to be discussing another aspect of the same procedure.
4. **Section 6**: This section provides information about "Trung hcp loai tru," which is likely another aspect of the same procedure.

The text is written in Vietnamese and appears