LONDON, England (CNN) -- When HIV-positive Winnie Sseruma was invited to speak on the subject at the United Nations in New York last June, she never expected that her condition would prevent her from obtaining a visa. HIV positive Winnie Sseruma was repeatedly questioned before being allowed into the United States. Winnie Sseruma has been  living with the disease for over 20 years. Preparing for her trip, UK-based Winnie discovered that the United States was one of 70 countries worldwide that either banned or restricted inbound travel for people with HIV. "I was told I needed to come to the U.S. embassy for an interview and bring a doctor's letter stating I was fit to travel," Sseruma, HIV coordinator for charity Christian Aid, told CNN.
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Russia is one of 11 countries worldwide that restricts HIV positive visitors
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The U.S. lifted similar ban last July, but has not yet been implemented
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Protesters argue that ban forces people to lie about health to gain entry
At the airport in @placeholder, Sseruma was detained twice for further questioning.