We’ve been telling you for years that the on...  ...pon a cardboard box containing six glass vials of variola virus (smallpox) samples that had been there who-...

An estimated 300 million people died from the smal...  ...ase eradicated in 1979. Since then, the only live variola samples, the virus that causes smallpox, are isol...  ...ver, scientists don’t know exactly how long variola virus can survive in dead tissue.Researchers have...