Name any two changes that occur in your body that will make you ill when you are in
contact with an infected person.

Solution 

When in contact with an ill person (suppose suffering from flu) , one can also get infected. 
The two changes are as follows - 
1. Fever (could be a result of infection) , this makes the body weaker and prone to further attack from pathogens. 
2. Weakened immunity combined with cough and cold. 
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