"The belief is growing on me that the disease is communicated by the bite of the mosquito... She always injects a small quantity of fluid with her bite - what if the parasites get into the system in this manner"

This quote by Ronald Ross recommends that he is starting to think that the disease is spread out through the bite of a mosquito. He is recommending that the mosquito injects a small amount of fluid when it bites, and that this fluid may consist of parasites that can enter the body and trigger the disease. This is an essential insight, as it recommends that the illness is not spread out through contact with an infected person, but rather through the bite of a pest. This could have significant implications for how the disease is treated and avoided, as it recommends that managing the mosquito population might be a reliable way to minimize the spread of the illness.