Influenza epidemics have been documented throughout history, with the first reliable report from the 12th century. The most memorable of modern major flu pandemics occurred in 1918, spreading rapidly worldwide and eventually killing more than 20 million people. The pandemic was nicknamed the “Spanish flu,” although it originated in a military camp in the United States, in Kansas.
The disease spread quickly, as troop ships transported the disease to many parts of the world, including Germany, France, and England. Around the same time, 8 million people throughout Spain became ill with a similar strain of influenza; hence, the name. The disease continued to spread across Africa, South America, and Canada. Within a few months more people had died of Spanish flu than of the Black Death in the Middle Ages.1
Causes of Influenza Like the common cold, flu is transmitted by viruses – specifically, influenza viruses – that attack about 10 percent of people during a normal winter. Because influenza viruses are much more aggressive and destructive than cold viruses, they demand a more forceful reaction from the immune system, which can weaken the body.
Flu viruses mutate rapidly, which means the immune system can no longer recognise the pathogens. Therefore, it is difficult for researchers to develop effective vaccines that provide lifelong immunity.
Protection Against InfluenzaFlu can be life threatening especially to the elderly, children or those with compromised immune systems. The single best way to protect against flu is to get vaccinated. But as history shows, the virus constantly mutates and changes. So you should strongly consider getting a yearly vaccination to help keep flu out of your future.
1 Potter, C.W. A history of influenza, Journal of Applied Microbiology, 2001; 91: 572-579.