| http://www.w3.org/ns/prov#value | - in the variables included in the model to predict the outcomes.To assess secondary attack rates, predictor variables examined included demographics and other characteristics of the index and secondary cases (e.g., gender, age group, whether or not born in the U.S., number of hours per week spent outside of the home, whether or not he/she had a chronic respiratory illness such as asthma, and influe
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