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Blood transmission Very Urgent

what if a person is exposed to HIV . he donates blood. blood is tested for Hiv and result comes out to be -ve. But he has not completed 30 days after exposer .After 30 days he becomes HIV +ve. what are the chances of hiv transmission due to previously donated blood?
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480448 tn?1426948538
No, blood is not stored for 30 days for testinG.  Donated blood and vlood products go thru A very RIGORUS testing process, using several different kinds of tests....

The blood supply is totally safe.
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Avatar universal
so it means blood is stored for atleast 30 days and then cheked reguraly
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Avatar universal
The screening of blood in blood banks happens mulitple of times before anyone is transfused with donated blood and has been since 1985.
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