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%.
To find a DNA fingerprint, a scientist has to first take the DNA out of the nucleus of a cell. The cell that is used to get a DNA fingerprint can be a skin cell, a hair root cell, or even a cheek cell that gets washed out of your mouth in your spit.This is because your unique DNA is the same in all of your cells.t would take the DNA out of a sample, make lots of copies of the DNA, and analyze the fingerprint. It would do all this at a fraction of the cost and in a fraction of the time that current methods use. Now let's look at some places other than police work where DNA fingerprinting is being used.