What events occur during the prodromal periods of a respiratory virus disease (e.g., parainfluenza virus) and encephalitis (e.g., St. Louis encephalitis virus)? List the viral characteristics...

What events occur during the prodromal periods of a respiratory virus disease (e.g., parainfluenza virus) and encephalitis (e.g., St. Louis encephalitis virus)?

List the viral characteristics (structure, replication, target tissue) that would promote transmission by the fecal-oral route, by arthropods, by fomites, by mother’s milk, and by sexual activity.