Environmental factors influencing the spread of communicable diseases ( part 1 )<br />Disease is largely an environmental issue. Sixty percent of emerging infectious diseases that effecting human are zoonotic . They originate in animals ,and more than two- thirds of those originate in wild life. The international Livestock Research Institute ,found that millions of People a year are killed by diseases that spread to human from wild and domestic animals.<br />In 400 BC,the renowned Greek physician “‘Hippo crate “ offered the earliest known account of seasonal respiratory disease. In 1856,the Scottish geographic “Alexander Keith-Johnson , depicted how some prominent virus and other disease were thought to vary in relation to some environmental factors such temperature and latitude. <br />A number of environmental factors affecting on the spreading of communicable diseases that can prone to cause epidemic(Endemic,Epedimic,and Pandemic, all denote the spread of an infectious disease but the extent of its spread differ).<br /> The most important of the environmental or ecological factors are: <br />Alack of safe water supply<br />Humidity<br />Temperature<br />Sanitation facilities <br />Climate<br /> wind spread<br /> Insects<br /> Animates<br />Latitudes<br />Poor living conditions<br /> poor hygiene’s<br />Unsafe food can all cause diarrheal disease and others<br />Viral contaminants of fomites can occur in many ways ( fomites define as solid environment surfaces that conserve in transmits of infections, these are of many types :-Items used to conserve warmth ,items used with eating, medical devices ,toilets seats ,toys and many others. ) <br />It isn’t only a public health issue, but the pandemic has profoundly disrupted economic one.<br />The word bank has estimated that a severe influenza pandemic for example, could cost the word three trillion dollars,( The Covid-19 pandemic is one of the most significant zoonotic events in Human history ).<br />