An influenza pandemic is a global outbreak of a new influenza A virus that is very different from the current seasonal influenza A viruses that are circulating in humans. Influenza viruses are constantly changing, which means that in very rare cases, non-human influenza viruses change their transmission routes and can infect people easily. At the same time, the virus can spread from person to person. This article will help you learn more about the terrible pandemics the world has experienced.

The world has experienced many pandemics, each one leaving behind serious human and economic consequences. When does a disease become a pandemic?

The Spanish flu pandemic of 1918 was one of the deadliest pandemics in history. It infected an estimated 500 million people worldwide (about a third of the population at the time) and killed 50 million. The 1918 flu pandemic was first detected in Europe, the United States, and parts of Asia before quickly spreading throughout the world. At the time, there was no vaccine or effective treatment for the disease.

We are experiencing days full of anxiety about the acute pneumonia caused by the new strain of coronavirus (Covid-19) when the number of infected people is constantly increasing, especially the epicenter in Wuhan city, China. The disease has spread to many countries around the world, people are afraid that this disease will become a new pandemic of humanity. In fact, we humans have experienced many major epidemics around the world, with very dangerous levels of destruction.

Influenza virus is the cause of influenza. This is an acute respiratory disease that spreads rapidly and can easily develop into an epidemic if not well controlled. Understanding how influenza virus changes helps improve the effectiveness of disease prevention.