Explain what an explosive epidemic is and the person to person spread?
• Explosive epidemic: It is characterized by the occurrence of many cases in relatively short period. The infection usually occurs when food or water becomes contaminated by the bacteria or virus, although other vehicles are also responsible for the infection
• Person to person: It takes a longer period to infect compare to Explosive epidemic. An infective agent will take different routes to infect the person like respiratory or gastrointestinal.