Answer:
Indirect
transmission occurs through flies, food and fluid, etc. Infectious agents are
transmitted through water and food including vegetable, fruits, milk, milk
products, ice, blood serum, plasma, etc. Their transmission is vehicle-borne.
Some examples are as follows:
1. Hepatitis A virus
Multiplies in water
2. Diarrhoea, typhoid fever, polio, cholera
Transmitted by water and food
3. Hepatitis B, malaria, syphilis, chagas disease
Transmitted by vectors
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