"Table 2.20: Cytopathic effects of specific viruses. (c) American Society of Microbiology. Redistribution authorized with attribution. Table 2.20: Cytopathic effects of specific viruses. (c) American Society of Microbiology. Redistribution authorized with attribution. Figure 2.82: This figure shows the possible outcomes of a hemagglutination test. modification of work by Centers for Disease Control and Prevention. Public Domain. Figure 2.83: Similar to rapid, over-the-counter pregnancy tests, EIAs for viral antigens require a few drops of diluted patient serum or plasma applied to a membrane filter (1). Modification of work by “Cavitri. CC BY 3.0 Unported. https://commons.wikimedia.org/wiki/File:ELISA_diagram.png"