In Jakarta, the head of UNAIDS criticized Indonesias leaders for not taking a more active role in combating the disease.
Dozens of HIV-infected women stepped out of the shadows during a rally in Golaghat, a town in Indias eastern Assam state, to acknowledge that they are living with the disease and should not be shunned.
"I marched through the town with more than 70 HIV-positive women like me... Im happy many women have paid heed to our call and have openly admitted to their HIV-positive status," said Jahnabi Goswami, 28. "Men with the disease need to follow suit."
An estimated 5.1 million people are living with HIV in India the most in any single country except South Africa. Indias sparsely populated northeast, where heroin traffickers cross from Myanmar, is considered a flash point because of its high rate of infections among intravenous drug users.
Australia on Thursday announced it would spend AUS$10 million (US$7.4 million) over five years to help India fight the virus in the northeast region.
In China, the government launched an HIV campaign aimed at some 120 million migrant workers, with Chinese Central Television showing condoms being passed out to workers at a Beijing construction site.
"Because of this publicity, I really feel I learned something about the harm of AIDS and I will share what I learned with my co-workers, friends and relatives," said Li Hongjian, a young worker in a hard hat with a large red ribbon pinned to his chest.
Chinas government estimates about 840,000 people could be infected with HIV and 80,000 others are likely living with full-blown AIDS. However, only about 167,000 are registered as being infected.
UNAIDS has warned up to 10 million could be infected in China by 2010 without more aggressive prevention.
The official China Daily newspaper said injecting drug users now account for the bulk of infections, followed by unclean blood selling practices and unsafe sex.
In Jakarta, UNAIDS head Peter Piot on Wednesday called Indonesias response to the disease "inadequate" and said it was vital that President Susilo Bambang Yudhoyono step up and take charge of the campaign.
An estimated 150,000 to 250,000 people are infected in the sprawling archipelago, but the virus is spreading quickly among injecting drug users, as well as sex workers and their clients, he said.
Countries across Asia said more focus must be placed on educating young people if the world is to have any chance of getting a grip on the disease. An estimated 8.3 million people are living with HIV in Asia, with 1.1 million newly infected last year, UNAIDS said in a recent report.
"Twenty-five years into the pandemic, this disease is becoming more visible in Pakistan yet continues to have an invisible face, a missing face, a young persons face. This needs to change," UNICEF representative Omar Abdi said in a statement Wednesday.
While its nationwide infection rate remains low, Pakistan contains all the ingredients for a potential HIV explosion, including poverty, illiteracy, a sex industry and injecting drug users, said Samia Hashim, UNAIDS senior national program officer in the country.
In South Korea, nearly 10,000 students at 300 high schools in Seoul were given HIV lessons.
"In Korea, people tend to think AIDS is a problem that has nothing to do with them," said Cha Hei-sun of World Vision Korea, which sponsored the event along with the United Nations Childrens Fund. "Peoples awareness of the disease is really needed here."
South Korea has identified more than 3,600 with HIV or AIDS. Of them, 705 have died.
In addition, North Korea marked World Aids Day by saying none of its people are infected with the disease, but that some foreigners have tested HIV-positive and have been sent home at their request.
"Preventive measures against AIDS have been taken so thoroughly that people are leading a happy life free from its damage thanks to the public health policy of the government," the communist Norths Minju Joson newspaper said in a report carried by its official Korean Central News Agency.
Meanwhile, 24 million condoms were expected to be distributed in Thailand to help raise awareness there, said Public Health Minister Phinij Jarusombat.
In Vietnam, US Ambassador Michael Marine said Wednesday more emphasis must be placed on making sure the message reaches children to keep the disease from spreading into the general population.
"I think that education has to start very young," he said.
So far, the disease in Vietnam remains largely concentrated in high-risk groups, such as injecting drug users and sex workers, but health workers fear the virus will eventually spread to the general population and result in a major epidemic.
"Its certainly not sufficient to focus on HIV/AIDS one day a year," Marine said. "Its something that should be in the forefront of peoples minds all the time."