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WABiologyQuick questions
Unit 4: Surviving in a Changing Environment
Quick questions on Transmission of infectious disease: WACE Year 12 Biology
4short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.
What is direct transmission?Show answer
Direct transmission occurs when a pathogen passes straight from an infected host to a new host without an intermediate. It includes:
What is indirect transmission?Show answer
Indirect transmission occurs when the pathogen reaches a new host through an intermediate. It includes:
What is factors that affect transmission?Show answer
How fast a disease spreads depends on several factors:
What is linking mode to control?Show answer
Understanding the mode of transmission tells you how to control a disease. Droplet-spread diseases are reduced by distancing and masks; waterborne diseases by clean water and sanitation; contact spread by handwashing and isolation; and vector-borne diseases by controlling the vector. Matching the control measure to the transmission route is the foundation of disease control covered later in the unit.
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