June 17, 2013 Smallpox is a serious and contagious disease due
to a virus. Recent findings and perspectives on medical
research. Vaccinations have been one of the most important
health advances in history. - Expert Q & A - Vaccinations
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Selected Studies: Immunizations Back to TopAlternative Names
Variola - major and minor; Variola Back to TopCauses Smallpox
was once found throughout the world, causing illness and death
wherever it occurred. It mainly affected children and young
adults. Family members often infected each other. Smallpox
spreads easily from one person to another from saliva droplets.
It may also be spread from bed sheets and clothing. It is most
contagious during the first week of the infection. It may
continue to be contagious until the scabs from the rash fall
off. Researchers believe that the smallpox infection might be
able to stay alive (under the right conditions) for