Final answer:
The effects of AIDS saw a declining trend in the 1990s thanks to improved treatments, increased condom use, and comprehensive sex education, leading to diminished new infections and deaths, although challenges remained in developing regions, particularly Sub-Saharan Africa.
Step-by-step explanation:
During the 1990s, there was significant progress in the fight against HIV/AIDS as a result of increased awareness, improved treatments, and changes in sexual behaviors. The introduction and widespread use of antiretroviral treatments contributed to a decrease in deaths caused by AIDS, as those infected with HIV could live much longer and healthier lives.
Statistics show a decline in new HIV infections, from 3 million in 2001 to 2.7 million in 2005, and deaths from AIDS decreased from 2.2 million in 2005 to 2 million in 2007. Meanwhile, the promotion of condom use and comprehensive sex education programs led to reduced high-risk behaviors and increased condom use, greatly reducing the transmission of HIV through sexual contact.
However, while treatments had improved in the developed world, making AIDS a manageable condition, infection rates continued to rise in parts of the developing world, with Sub-Saharan Africa bearing a significant portion of the burden.