Pandemic - J. F. Bone (Short Story)

"Pandemic" by J. F. Bone
Genre: Science fiction
Original publication: Analog, February 1962
Synopsis:
Immunology researcher Alan Thurston is on the brink of making a major scientific discovery that will impact humanity for thousands of years. But at a crucial juncture in the project, something goes horribly amiss. Will Thurston and his team be able to set things right again?

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That was very good