Two hundred fifteen people attended a wedding reception in Ballard. Over the following few days after the reception, seventy-sixpeople reported symptoms of gastroenteritis (“stomach flu”). You are interested in the

Two hundred fifteen people attended a wedding reception in Ballard. Over the following few days after the reception, seventy-sixpeople reported symptoms of gastroenteritis (“stomach flu”). You are interested in the shrimp hors d’oeuvre served during the cocktail hour as the vehicle for infection in this outbreak. You interview those who attended the wedding reception and find 78 people ate the shrimp and 48 of them became ill. measure(s) of association would you use to determine if illness is associated with eating shrimp? Select all that apply. Incidence Attack rate Risk difference Relative risk Case fatality

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