Hultin never wrote up his results, never published a scientific paper on his failed attempt to resurrect the 1918 flu virus. “I thought, ‘I have it all, I can always write it up later,’” he said. By then, his six-month stay had been extended to two years and he was expected to finish his master’s degree—imminently. “I was busy with my master’s degree project and it was a negative finding,” Hultin said. “If it had been positive it would be tremendous, but it was negative.”