Question

draw a line from the examples to the link in the chain it falls under. unprotected sex humans open wounds that are not infected elderly sneezing virus infectious agent reservoir portal of exit mode of transmission portal of entry susceptible host kissing animals/insects bacteria inhaling infants vomitting

Explanation:

• Infectious Agent: Virus, Bacteria. These are the disease - causing microorganisms.
• Reservoir: Humans, Animals/Insects. These are places where the infectious agents live.
• Portal of Exit: Sneezing, Vomiting. These are ways the agent leaves the reservoir.
• Mode of Transmission: Unprotected Sex, Kissing, Inhaling. These are how the agent is passed from one place to another.
• Portal of Entry: Open Wounds (that are not infected), Mouth (implied by kissing and inhaling). These are how the agent enters a new host.
• Susceptible Host: Elderly, Infants. These groups are more likely to get infected.

Answer:

• Infectious Agent: Virus, Bacteria
• Reservoir: Humans, Animals/Insects
• Portal of Exit: Sneezing, Vomiting
• Mode of Transmission: Unprotected Sex, Kissing, Inhaling
• Portal of Entry: Open Wounds (that are not infected)
• Susceptible Host: Elderly, Infants