What is the pandemic?
Pandemia is a global outbreak of a serious disease that exceeds "normal" levels of mortality and infection level for typical diseases. In this respect, the definition of pandemia is partially subjective, but in most cases the difference between the normal status of the background and the pandemic state is noticeably obvious. Throughout history, pandemic was the worst killer of human beings who killed more people than all wars and accidents in modern history together. In the last 90 years, it seems that historical pandemic is usually under control, although the HIV virus that appeared at the age of 80 has killed millions and is still a serious problem.
Historically, the largest pandemic was caused by smallpox, flu, cholera, typhoid and bubonic plague. The largest pandemic in history is often cited as black death (considered a bubonic plague), which claimed 75 million lives and killed about a third of the population of Europe and China at the end of the 40s. Recovery took more than a generation. Native Americans andThe native Australians were lucky that these populations were disconnected from the populations of Africa and Eurasia at that time. Black death was spread by infected rats.
Another massive pandemic, the Spanish flu, spread around the world in 1918, immediately after World War II, killed 50-100 million people and competed the intensity of black death. This flu was unusual in killing people in first -class lives than just old or infants. It is assumed that death was caused by storms of cytokines, a hyperactive reaction of the immune system that leads to the death of the body to protect. In the storm of cytokines immune cells clog the body so quickly that they cause even greater damage than the flu itself.
When they happen, the pandemic radically changed the course of history and world events. If there was no Europe in Europe, economic and technological progress and colum could be acceleratedThe bus could reach America up to a hundred years earlier. Today, many governments are worried about new pandemics caused by mutation of bird flu and hundreds of millions of doses of immunization shots have been supplied.