calculating a food-specific attack rate = ((# of people who ate a specific food who became ill) / (Total # of people who ate that specific food) *100) If everyone who ate at a food cart cook-off event got ill, you could interview those people and calculate the food-specific attack rate for specific food to isolate the source of the outbreak. Context TOTAL NUMBER of persons who ate each specific food combination Ate bratwurst Did not eat bratwurst Ate waffles Did not eat waffles 297 131 Number of persons who ate gach specific food 390 89

calculating a food-specific attack rate = ((# of people who ate a specific food who became ill) / (Total # of people who ate that specific food) *100) If everyone who ate at a food cart cook-off event got ill, you could interview those people and calculate the food-specific attack rate for specific food to isolate the source of the outbreak. Context TOTAL NUMBER of persons who ate each specific food combination Ate bratwurst Did not eat bratwurst Ate waffles Did not eat waffles 297 131 Number of persons who ate gach specific food 390 89