Miguel is often sick in the winter months and is concerned about catching a virus in his college dorm. Which of the following is likely to be the most effective thing he can do to break the chain of infection?

A. Double his intake of water
B. Get boosters for immunizations 6 months early
C. Clean his dorm room often
D. Wash his hands frequently

The most effective measure to prevent the spread of infections is frequent handwashing. Cleaning the dorm room can support this measure. Boosters and water intake are not as directly effective.

Explanation:

Washing hands frequently is likely the most effective action to break the chain of infection. Microbes can spread easily from person to person via surfaces like doorknobs, and handwashing helps prevent these microbes from entering the body.

Cleaning the dorm room often can also help reduce the presence of microbes, but handwashing remains the most essential preventive measure against contagious illnesses.

Boosters for immunizations and increasing water intake do not directly address the transmission of microbes through contact, making them less effective in breaking the chain of infection.

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