Laser lithotripsy. Laser lithotripsy is a surgical procedure to remove stones from urinary tract, i.e., kidney, ureter, bladder, or urethra.
HIV-1 is surprisingly old, and it probably debuted in humans at least three separate times -- one for each subtype, M, N, and O. Scientists' best guess is that the precursor of the most common M virus jumped from the Cameroon chimps to humans sometime before 1931.art One: Chapter Four Scientific Breakthroughs. HIV-1, which is responsible for the vast majority of AIDS cases worldwide, is divided into three groups -- the major group M, and the much rarer outlier group O and new group N -- that have diverged over years of mutation and evolution.
We have listed the top 10 scientific reasons why HIV cannot cause AIDS below. 1. HIV (like other viruses) is harmless after antibody immunity. 2. HIV does not kill T-Cells it infects. 3. HIV does not infect enough T-Cells to cause Aids. 4. HIV has no AIDS causing gene. 5. There is no such thing as a slow virus.