A parasitic source can lead to an epidemic. It could be an infectious disease that infects humans, animals, or both. Typhoid is cholera, meningococcal and viral meningitis, and the new omicron variant is some of the many signs of a pandemic.   Such communal outbreaks can also result from a sudden change in ecology. A genetic modification of the pathogen supply, or even the new ones, can occur if a vector species increases or premature density.   It is dangerous as it poses a substantial global threat.   When a sudden increase in anxiety caused an epidemic in Wuhan, China, in December 2019, global anxiousness increased. According to health experts,…