EVERYDAY SCIENCE

Detailed explanation-1: -In being declared a pandemic, the virus has nothing to do with virology, population immunity, or disease severity. It means a virus covers a wide area, affecting several countries and populations.

Detailed explanation-2: -A pandemic is like an epidemic but even more widespread over several countries or continents. Most of the diseases posing the greatest risks to humans are contagious meaning that they are caused by an infectious agent and can be spread from person to person.

Detailed explanation-3: -Though an endemic is a constant presence in a community, it differs from a pandemic because the virus is somewhat contained and not spreading out of control and not stressing the health care infrastructure, therefore we can more easily prevent and treat it.

Detailed explanation-4: -AN EPIDEMIC is a disease that affects a large number of people within a community, population, or region. A PANDEMIC is an epidemic that’s spread over multiple countries or continents. ENDEMIC is something that belongs to a particular people or country.

Detailed explanation-5: -The Russian flu that occurred between 1889 and 1893 was the first well-described pandemic (Taubenberger et al., 2007). This pandemic was possibly caused by an A/H3N8 virus based on serologic and epidemiologic data (Worobey et al., 2014).