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[21] [22] According to the World Health Organization, approximately 10 million new TB infections occur every year, and 1.5 million people die from it each year – making it the world's top infectious killer (before COVID-19 pandemic). [21] However, there is a lack of sources which describe major TB epidemics with definite time spans and death ...
An emerging infectious disease (EID) is an infectious disease whose incidence has increased recently (in the past 20 years), and could increase in the near future. [2] [3] The minority that are capable of developing efficient transmission between humans can become major public and global concerns as potential causes of epidemics or pandemics. [4]
Since the Middle Ages, influenza pandemics have been recorded every 10 to 30 years as the virus mutates to evade immunity. [125] [126] Influenza is an endemic disease, with a fairly constant number of cases which vary seasonally and can, to a certain extent, be predicted. [127] In a typical year, 5–15% of the population contracts influenza.
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Although many viruses of vertebrates are restricted to one species, influenza virus is an exception. [191] The last pandemic of the 19th century occurred in 1899 and resulted in the deaths of 250,000 people in Europe. The virus, which originated in Russia or Asia, was the first to be rapidly spread by people on trains and steamships. [192]
New viruses and strains of viruses were discovered in every decade of the second half of the 20th century. These discoveries have continued in the 21st century as new viral diseases such as SARS [72] and nipah virus [73] have emerged. Despite scientists' achievements over the past one hundred years, viruses continue to pose new threats and ...
This is a timeline of influenza, briefly describing major events such as outbreaks, epidemics, pandemics, discoveries and developments of vaccines.In addition to specific year/period-related events, there is the seasonal flu that kills between 250,000 and 500,000 people every year and has claimed between 340 million and 1 billion human lives throughout history.
That could change if not enough people get their seasonal flu shot. The potential for danger lies in H5N1’s genetic pliability, according to Edwin Michael, PhD , an epidemiologist at the ...