The U.S. declares it has the best health care service in the world, but quite a lot Americans can not enjoy due medication and health care, said a Chinese report on the U.S. human rights record on Friday.

The Human Rights Record of the United States in 2011, issued by the State Council Information Office of the People's Republic of China, said the number of U.S. citizens who lacked health insurance in 2010 climbed to 49.9 million, and nine million Americans have lost health insurance during the past two years.

Moreover, an additional 73 million adults had difficulty paying for health care and 75 million deferred treatment because they could not afford it.

According to the report, death and infection risks caused by AIDS were also on the rise in the U.S.

The report said that since the first American patient was diagnosed with AIDS in 1981, 600,000 people died from the disease in the U.S. by the end of 2008, 1,178,350 Americans had been infected with AIDS.

In addition, nearly three quarters of the HIV carriers do not have the infection under control, and one in five people with human immunodeficiency virus is unaware that they have the disease, with only 51 percent undergoing medical treatment, it said.