PEP is intended for rare, one-time exposures -- not for repeated use. For people who are exposed to HIV on a regular basis, a more controversial approach is being studied: the use of HIV meds to prevent infection before exposure. Called PrEP, for pre-exposure prophylaxis, it is based on the common practice of using antiretrovirals to prevent HIV transmission in pregnancy.
Forensic methods to identify someone. have evolved from analyzing a personâs actual fingerprints (looking at the arches and. whorls in the skin of the fingertips) to analyzing genetic fingerprints. DNA fingerprinting. also is called DNA profiling or DNA typing. Although human DNA is 99% to 99.9%.
DNA Analysis: Traditional Techniques. From the crime scene, a piece of DNA evidence travels to a forensic laboratory. These labs vary quite a bit, both in terms of how they are structured and what kind of analyses they offer.rivate forensic laboratories, some dedicated just to DNA analysis, also exist. Many labs have the ability to conduct testing on nuclear DNA, which is the copy of DNA that exists in the nucleus of every cell. But only a few labs offer more specialized techniques, such as Y-chromosome or mitochondrial DNA analysis.