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Protective immunity and vaccines to schistosomiasis

D G Colley1, M D Colley

  • 1Department of Microbiology and Medicine, Vanderbilt University School of Medicine, Nashville, TN 37232, USA.

Parasitology Today (Personal Ed.)
|November 1, 1989
PubMed

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Smallpox

Smallpox is a severe contagious disease caused by the Variola major virus, a double-stranded DNA member of the Poxviridae family.Variola major transmission occurs primarily via inhalation of virus-laden droplets or direct contact with infectious scabs. The incubation period averages approximately seven days, although it may range from 7 to 17 days depending on the inoculum and host factors.Clinically, the prodromal phase is marked by an abrupt onset of high fever, malaise, headache, and myalgia.
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