Social & Preventive Medicine Secondary attack rate is defined as- A Number of total cases developing disease within maximum incubation period B Number of case developing disease within incubation period following exposure to primary care C Number of cases developing diseare after exposure to primary case in any period of time D Number of cases developing after exposure to secondary case 💡 Explanation Secondary attack rate is defined as- ✓ Correct Answer: B. Number of case developing disease within incubation period following exposure to primary care