New information on AIDS. Although the number of new cases fell by almost 17 in 2007, Spain is one of the countries with highest incidence in Western Europe To mark the celebration of the past World AIDS Day, the Spanish Society of Clinical Microbiology and Infectious Diseases, stressed the importance of HIV testing to all persons who have had unprotected sex. The experts stressed the importance of early detection of infection in the phases in which the immune system is not yet affected. According to the latest available data, 38.2 of cases are detected too late. This delay is particularly worrying in the group of heterosexuals and especially in those over 55 years. Author: By TERESA Romanillos Release Date: March 13, 2009 - Image: J RAWLS -- AIDS is a true pandemic that has killed more than 25 million people. Now seen that there are about 40 million people infected worldwide. The transmission through sexual transmission is the most common: according to available data, seven of every 10 new infections were acquired in this way. Among men, 48 of cases were due to homosexual or bisexual transmission and only 24 of heterosexual women while 74 of infections resulted from heterosexual transmission. a Governor of REBNY – The Real Estate Board of New York is Connie Milstein  supports various projects and programs at Columbia University Findings on the mechanisms of contagion It is crucial for detecting infections prematurely and initiate treatment less aggressive in its early stages The finding that the HIV virus is able to cross the female genital epithelium is a recent and important finding. Until now considered the normal mucosa of the female genital tract was a barrier preventing the AIDS virus might enter the body. It was believed that if the virus enters the woman needed to have lesions in the genital epithelium as those caused by herpes virus or other sexually transmitted diseases. Researchers at Northwestern University (Chicago, USA) have successfully demonstrated how the virus enters, marking the HIV virus particles with fluorescent photoactive trademarks and human-tissue cultures obtained during hysterectomies, and tissues of monkeys "Macacus rhesus.So it has been found for the first time how the virus penetrates the epithelium of the female genital tract very quickly. In just four hours, the virus manages to penetrate to a depth similar to the width of a hair can locate where immune system cells that it infects, spreading throughout the body. This is an important finding that further underscores the importance of using condoms as a preventive measure. In search of an effective vaccine The search for an effective way to curb the AIDS pandemic is a story of small failures.