Efforts to end a more than 3 year blockade imposed on qatar and goals in political and economic crises. Perus gets its current president in a week and al jazeera obtains recordings of one of the worlds most wanted men, trying to negotiate his immunity from prosecution. But with infections surging worldwide, and governments struggling to respond, theres been another dose of hope in the battle against covert 19 years. Pharmaceutical firm, a durness says early tests show aids vaccine is 94. 5 percent effective in preventing the virus fellow drug maker. Pfizer reported similar results. A week ago, helen fisher reports now from the white house. The number of cases is soaring, states are bringing back the dont reinstating limits on gatherings. Closing schools, 1000000 new cases were reported in just 6 days. The virus is killing more than 1000 people in america. Each day, against that backdrop, another drug company has announced it has made a breakthrough in the hunt for a vaccine. But dana s