Human papilloma virus (HPV) enters healthy tissue (left) by way of a cut or abrasion to infect basal keratinocytes (middle). The virus spreads as it replicates and integrates into the DNA of the cells (right), where it begins a process of malignant change, multiplying and forming a tumor (pale yellow, center). The HPV vaccine is directed against these cells.
Credit
Carol Werner
Dimensions
5100 x 3400 pixels
Print Size @ 300 dpi
17 x 11 inches / 43 x 29 cm