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It determines an organism's ability to cause disease.
Virulence measures the severity of the disease caused.
They are characteristics that enhance a microorganism's disease-causing ability.
Microorganisms establish themselves without invading tissue.
Infection involves tissue invasion and immune response.
An infected host shows no symptoms but can transmit the pathogen.
It has a short but severe course.
It remains asymptomatic for a long time but can reactivate.
It occurs suddenly with intense multiplication of the agent.
It shows no clinical symptoms despite the presence of pathogens.
It provides external barriers to prevent pathogen entry.
Innate immunity is nonspecific, while adaptive immunity is specific and has memory.
Cell-mediated and antibody-mediated responses.
They recognize and respond to specific antigens.
It can lead to successful infection and disease development.
Phagocytes, natural killer cells, and inflammation.