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: ...

PHILADELPHIA, Pa. — Frozen vials labeled “smallpox” that were recently discovered at a Pennsylvania facility contained no trace of the virus that causes the eradicated disease, according to the ...

(Original Caption) Smallpox in an unvaccinated child. Is it finally time to eliminate the remaining stocks of variola (smallpox) virus for good? The World Health Assembly will discuss the current ...

It all started with an unremarkable trip to grandma’s house in 1970. But two days into the visit, something went terribly wrong. The 9-month-old grandson fell ill. First, a fever. Then, a nasty rash.