Complex sentence: Category B pathogens are the second highest priority organisms/biological agents, because they are moderately easy to disseminate, result in moderate morbidity rates and low mortality rates, and require specific enhancements for diagnostic capacity and enhanced disease surveillance.
Split into simpler sentences: Category B pathogens are the second highest priority organisms/biological agents. They are moderately easy to disseminate, result in moderate morbidity rates and low mortality rates, and require specific enhancements for diagnostic capacity and enhanced disease surveillance.