Characteristics of pandemic ... are

Yeah what he said hahah well explained

It is affecting most population depending on whether it is a disease or something else. For example an outbreak of berberi happened in the 1300s in which chickens were staggering around and this was a very common symptom of berberi. The coopmaster found out they were being fed rice without its bran. The chickens were given rice still with its bran. The chickens got better. Turns out the same thing worked for people.