In 1927, in West Africa, a blood specimen was taken from a native man named Asibi, who was sick with yellow fever. A vaccine was made from the original strain of the virus obtained from this man. In fact, all the vaccine manufactured since 1927 derives from the original strain of virus obtained from this one man.
This vaccine has been carried down to the present day from one laboratory to another around the world, through repeated cultures and by enormous multiplication, it has offered immunity to yellow fever to millions of people in many countries.
The blood of this one man in the West Africa has been made available to serve the whole human race
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