Parameters in epidemiological models are quantifiable elements that define the characteristics of disease transmission and progression. Common parameters include: - Basic reproduction number (R0): The average number of secondary cases generated by one primary case in a fully susceptible population. - Transmission rate: The rate at which an infectious disease is transmitted from person to person. - Recovery rate: The rate at which infected individuals recover from the disease. - Incubation period: The period between exposure to the pathogen and the appearance of symptoms. - Mortality rate: The proportion of infected individuals who die from the disease.