The World Health Organization is expected to declare H1N1 flu a pandemic as the number of cases continues to grow worldwide. Ray Suarez speaks to WHO Director Margaret Chan in Geneva.
Two new studies of topical gels meant to prevent the transmission of HIV are providing fresh hope for the field of HIV prevention research after a string of disappointing set-backs.
By Admin, PBS NewsHour
The country's transition to digital television is being postponed until June 12, following a vote in the House of Representatives that sends the bill to the White House, where President Barack Obama is expected to sign it.
By PBS NewsHour
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