翻译原文：

NEW DELHI (Reuters) - The number of people living with HIV/AIDS in India is 2.47 million, less than half of previous official estimates, according to new U.N.-backed government estimates released on Friday.

India was thought to have the world's biggest HIV-positive caseload with 5.7 million infections but the new estimate puts it below South Africa and Nigeria.

The new figure was calculated with the help of the United Nations and United States Agency for International Development.

"We have about 2.47 million estimated cases which is huge in terms of numbers," Health Minister Anbumani Ramadoss told a news conference. "In terms of human lives affected, the number is still large, in fact very large. This is very worrying for us."

The prevalence level of the infection was now estimated to be around 0.36 percent of the more than 1.1 billion population from the earlier 0.9 percent, he said.

The minister's comments came at the launch of the country's new $2.8-billion National AIDS Control Program, which aims to expand free treatment for HIV-positive people and roll back the epidemic through more prevention campaigns.

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