An epidemic is a broad term used to describe any problem that is actively spreading and has grown out of control.
The pandemic relates to geographic spread. It describes a disease that affects a whole country or the entire world.
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Epidemiology is the branch of medicine that handles the following:
Two measurable factors mostly define the level of disease occurrence:
The one staging model used to direct the public health response involves the flu. The same basic model can be applied with variations to epidemics like tuberculosis or malaria.
This bubonic plague pandemic started in the Yunnan province in China. Over the next 20 years, rats carried the infectious fleas responsible for the disease to Hong Kong and port cities around the world.
It caused almost 10 million deaths.
The first significant flu pandemic started in Siberia and Kazakhstan, traveled to Moscow, and made its way into Finland and then Poland, where it moved into the rest of Europe. By the following year, it had crossed the ocean into North America and Africa. By the end of 1890, 360,000 had died.
Staying home during the pandemic helps prevent health systems from being overloaded.
Overloading hospitals can likely be averted with protective measures like closing schools, canceling mass gatherings, working from home, self-quarantine, self-isolation, avoiding crowds. All these keep the virus from spreading fast.