From the NYT story on the recreation of the Great Influenza pandemic strain:
But Dr. Jeffery Taubenberger, chief of the molecular pathology department at the Armed Forces Institute of Pathology in Washington, had an idea for finding that ancient virus. He recalled that his institute had a warehouse of autopsy tissue, established by President Lincoln.
Dr. Taubenberger investigated and found tissue from two soldiers who died of the 1918 flu, one in Massachusetts, one on Long Island. The tissue was snips of lung soaked in formalin and encased in little blocks of wax. In that tissue was the virus, broken and degraded, but there, untouched for nearly 80 years.
This just in: Lincoln planned to raise army of zombies.