Electron micrograms of:- (a) Purified vaccinia virus

Electron micrograms of:- (a) Purified vaccinia virus, (b) Laked fowl red blood cell after absorption of influenza virus, showing only spherical virus particles, (c) Laked fowl red blood cell, (d) Laked fowl blood cell after absorption of influenza virus, showing both spherical and filamentous forms, (e) Same cell virus as in (d), by transmitted electron beam