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micrograph of skin infected with the smallpox variola virus
histologic changes in human skin that has been infected with the smallpox variola virus
smallpox virus pocks on the chorioallantoic membrane of a developing embryonic chick1
micrograph depicts the variola smallpox virus using a negative stain technique magnification 65000x
electron micrograph of a vaccinia virus close up
smallpox virus pocks on the chorioallantoic membrane of a developing embryonic chick
chick chorioallantoic membrane fluorescent antibody staining was done after smallpox virus inoculation
electron micrograph of a vaccinia virus virions cells
histochemical technique in processing this tissue specimen this image reveals the presence of the west nile virus
micrograph of the west nile virus it can infect humans birds mosquitoes horses and some other mammals
an electron micrograph of the west nile virus
west nile virus virions in an isolate that was grown in a cell culture
transmission electron micrograph of the west nile virus
micrograph of the west nile virus