In Europe, the Black Death raged for three centuries, killing more than 25 million people.
The pathogen that caused the plague was carried by fleas hidden in the fur of black mice.
/kloc-in the 0/4th century, there were many black mice.
Once the disease occurs, it will spread quickly.
Many people died of the Black Death, so that the labor force lacked food.
The whole village is deserted, the farmland is deserted, and the grain output is declining.
Famine occurred in many parts of Europe after the Black Death.
The disaster caused by Spanish influenza is the most serious in the history of influenza epidemic, and it is also the plague with the largest number of deaths in history. It is estimated that the number of patients worldwide exceeds 700 million, the incidence rate is about 20% ~ 40%, and the death toll exceeds 40-50 million.
Studies by American scientists show that the Spanish influenza virus that killed 50 million people in1918-1919 probably originated from birds.
It's actually a variation of bird flu.
Similar to the Black Death, during the flu, the transportation, catering, retail, tourism and entertainment industries were depressed, and hospitals and health services became the biggest winners.
It is worth mentioning that the communication industry is developing well.
The main country of mad cow disease is Britain.
It is estimated that the death toll is increasing at a rate of about 30% every year. So far, 69 people have died from this epidemic.
It has spread to France, Ireland, Canada, Denmark, Portugal, Switzerland, Oman, Germany, Poland, Czech Republic, Hungary, Slovakia, Albania, Estonia, Lithuania and Cyprus.
According to CNN, the mad cow disease incident will cause at least billions of dollars in economic losses to the United States.
200 1 Foot-and-mouth disease broke out in Britain, causing nearly 7 million livestock infected with foot-and-mouth disease to die and burn, and many farmers suffered heavy losses.
Most countries in the world, such as America, Canada, Japan, South Korea, Australia, New Zealand and some European countries; Southeast Asian countries, China, Hongkong and Chinese mainland are all "foot-and-mouth disease areas".
Foot-and-mouth disease reduced Britain's economic growth rate from the original forecast of 2.3% to 2%, resulting in economic losses of 7 billion pounds.
Tourism, one of the pillar industries, was hit hard.
According to reports, compared with the same period in 2000, the tourism income in rural areas of Britain alone has decreased by 75%.
SARS 2003, atypical pneumonia broke out in 24 provinces, autonomous regions and municipalities directly under the Central Government of Chinese mainland, affecting 266 counties and cities (districts).
As of August 6th 10, there were 5,327 clinically diagnosed cases of atypical pneumonia in Chinese mainland, 4,959 cases were cured and 349 cases died.
In 2003, the tourism revenue decreased by about 654.38+0.20 billion yuan, which affected the annual GDP growth by 654.38+0.654.38+0 percentage point.
The retail sales of catering industry decreased by about 310.5 billion yuan, which affected the GDP growth by 0.3 percentage points.
The overall impact on other consumer goods is small, about 20 billion yuan, affecting GDP growth by 0.2 percentage points.
The net export of foreign trade decreased by about $7 billion compared with 2002.
Up to now, 393 people have been infected with avian influenza in 15 countries and regions, including 248 deaths, with a mortality rate of 63%.
Since 2003, 3 1 person has been infected with avian influenza in China, and 2 1 person has died.
At the beginning of 2004, avian influenza swept across the United States and some Asian countries, and millions of poultry in China, Japan, Viet Nam and other countries were infected and died, and many people may have died of avian influenza virus.
By the end of 2005, bird flu has caused more than 65.438+0.5 billion birds to be culled, 63 people died, and the direct economic loss was as high as 65.438+0.0 billion dollars.
The scope spread to agriculture, tourism and other industries.
The World Bank predicts that bird flu will cause global economic losses of 800 billion US dollars.
What is avian influenza? Swine flu mainly occurred in Mexico, and the number of confirmed and suspected swine flu deaths rose to 152; There are more than 4,000 suspected cases in China.
The number of confirmed cases in the United States rose to 50, and it also spread to Canada, Britain, France, Germany, South Korea, New Zealand, Australia, Italy and other countries 19.
The World Bank predicts that the world will lose $3 trillion and the economic recovery will be greatly affected.
Swine flu is likely to spread in two ways, from pigs to people and from people to people.