Even if these efforts are successful, it will be several years before a vaccine has been developed, tested, and proved safe for general use.
विविध देशांनी या निधीकरता देऊ केलेल्या देणग्यांची आतापर्यंतची एकूण बेरीज आवश्‍यक रक्कमेपेक्षा बरीच कमी आहे.