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Electron microscopic images of human cancer cells after viral infection. WiDr cells or A549 cells were administered with Tris-HCl (control), naked virus, or polymer-coated virus (coated virus) at an MOI of 1 for 1 hour and incubated for another 12 hours. Black arrow heads and white arrow heads show virus particles. (a) WiDr cells after infection with control or the naked virus. (b) WiDr cells infected with the coated virus.
