Translations:Advanced Field Epi:Manual 1 - Disease Investigation/98/en
For example, in the foot-and-mouth disease example shown in the previous figure, 8 of 21 buffalo <1 year old were affected for an attack rate of 0.38 or 38%. In contrast, 34 of 158 buffalo >1 year old were affected (attack rate = 0.215 or 21.5%). This suggests that young animals were almost twice as likely to be affected as older animals.