A review on Covid-19 (corona virus disease)‎, transmission and pathological effects

الملخص EN

In response to public health, it is necessary to write a review on COVID-19 disease as emerging zoonotic disease.

Transmission of the new pathogen SARS-CoV-2 virus have several ways, spill - over or Evolutionary jump help virus to spread from one host to another with a rapid adaptation (Epidemiological cycling).

Covid-19 can transmitted from animals to humans (Zoonotic disease) or from humans to animals ( Zooanthroponosis) or from humans to humans (Emerging Infectious disease) or from animals to animals as infectious disease.

On other hand some several wild animals considered reservoir host such as bats, snakes, frogs, hedge-hog, wild rats, marmots and rabbits.

[ 17 16] Since December 2019 when Covid-19 emerged in human from seafood market at Wuhan Huanan city south China, rapidly transmitted all over the world as viral outbreak.