Not so with smallpox. To create this vaccine, you begin with another virus that is similar to the smallpox virus, yet different enough not to bring on the smallpox disease once it enters your body.

Smallpox, one of the biggest killers in history, is caused by a virus called variola. Variola causes a distinctive rash and is often lethal. The name variola comes from the Latin word for “spotted” ...

Smallpox is a viral, infectious disease that once terrorized us humans. It causes a significant skin rash and fever, and during the most rampant outbreaks in the 20th century, killed an estimated ...

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In the 20th century alone, an estimated 500 million lives succumbed to smallpox, making it the sole human disease to have been eradicated. However, a new report, the Future State of Smallpox ...

Smallpox, or variola, virus has killed more human beings than any other infectious agent. Fortunately, smallpox virus has only one host-humans -- which made it possible to eradicate it. In 1967, the ...

yet other virus infections should be ruled out, including herpes simplex, enteroviruses, and smallpox. The lesions often vesiculate and then umbilicate, but the rash is usually self-limited and ...

Symptoms of monkeypox can also be compared with smallpox — a related virus that was declared eradicated in 1980. Like smallpox, monkeypox causes pus-filled boils. But monkeypox is generally ...

All research involving the virus samples requires approval from a special World Health Organization committee of experts. The World Health Assembly, the governing body of WHO, originally scheduled ...

Vaccinia: Virus in the vaccine used to prevent smallpox and other orthopoxvirus infections. Vaccinial encephalitis: Serious adverse effect of smallpox vaccine, characterized by encephalitic ...

There are two smallpox vaccines in the US. For the newer, safer one, supply is scarce — representatives from the Centers for Disease Control and Prevention said on Monday that upwards of 1,000 ...

It can be confusing, because as a verb, plague means “to cause continual distress”, yet as a noun, it means a deadly disease that ... and new ones to arise. Smallpox first emerged around ...