Scientists have discovered extinct strains of smallpox in the teeth of Viking skeletons—proving for the first time that the killer disease plagued humanity for at least 1400 years. Smallpox spread ...

Three-dimensional rotation view of the smallpox virus topoisomerase enzyme-DNA complex (DNA, yellow; topoisomerase, blue; covalent bond between the topoisomerase and the DNA, pink sphere) Disclaimer: ...

Smallpox, the only human infectious disease to have been successfully eradicated, ailed people at least 1,000 years earlier than previously thought. A study of DNA sampled from Viking Age skeletons ...

An international team of scientists has discovered extinct strains of smallpox in the teeth of Viking skeletons from sites across northern Europe, and reconstructed near-complete genomes of the ...

Smallpox was a severe infectious disease that affected humans for thousands of years before its eradication in the late 20th century. The symptoms included a distinctive rash, pustules, and fever.

Scientists have discovered extinct strains of smallpox in the teeth of Viking skeletons -- proving for the first time that the killer disease plagued humanity for at least 1400 years. Scientists have ...