The Population Council conducts biomedical research to develop contraceptives and social science research to better understand the factors influencing access to and decision-making around contraceptives. Its research on reproductive and immunological processes serves, not only as the basis for the development of new contraceptive methods that reach out to both men and women, but also for new hormone therapies and AIDS-prevention products. The council is involved in a "collaboration with industry partner ProMed Pharma to develop innovative new vaginal rings that may make STI prevention more acceptable and effective for women." In the 1960s, the Council played a key role in documenting the large numbers of people in poor countries who lacked access to contraceptives and in conducting research to design and evaluate public family planning programs. This included bringing IUDs to India. At this time, the Council's biomedical researchers worked to develop contraceptive methods, such as the intrauterine device. The council has found that fertility is "most sensitive to changes in the proportions married and prevalence of contraception." A country's ideas around reproduction out of wedlock, its accessibility, and the public's opinion of birth control are instrumental in the region's fertility. An array of contraceptives available around the world today were developed by the Population Council, including: the Copper T Intrauterine device, Norplant, Jadelle (Norplant II), Mirena, and, in 2018, a one year contraceptive vaginal system called Annovera was approved by the US FDA. More than 50 million Copper T IUDs have been distributed in over 70 countries. Norplant was replaced by Jadelle, a two rod implant that provides contraception for five years. The British medical journal "Lancet" said of the Population Council, "Most non-governmental organizations claim to promote change; the Population Council actually has hard evidence of having changed the lives and expectations of hundreds of millions of people." The Population Council provides programs all over the world that aim to address the prevention and treatment of the HI virus. These programs help to develop new technologies and distribute them to marginalized populations, and also educate people about HIV through workshops and mentorship services. For example, Empowering Girls and Young Women at High Risk of HIV Infection: A Capacity Strengthening Project is a project with locations in 15 different African countries that reaches girls and young women who have the highest risk of HIV transmission and provides them with resources to prevent the virus. The Council is constantly conducting research to find high risk populations and the most cost-effective ways to get them the treatment they lack. The Council partners in a project called Link Up that is based in Bangladesh, Burundi, Ethiopia, Myanmar, and Uganda, which focuses on the population of young people ages 10 to 24 who represent a large proportion of HIV infections.