Worst pandemics in history-Influenza pandemic
It is also known as flu that is caused by several viruses. It attacks on respiratory system and its effects can range from mild to severe. There have been six influenza pandemics in the last 150 years.
• Flu pandemic:
It is started in 1889 and end in 1890. The death ratio was 1million.
• Spanish flu
It is started from 1918 and end in 1920. The death rate was 17-100million.
• Asian flu
It is started from 1957 and end in 1958. The death ratio was 1-4million.
• Hong kong flu
It is started from 1968 and end in 1969. The death ratio was 1-4million.
• Russian flu
It is started from 1977 and end in 1979. The death ratio was 700,000.
• Swine flu
It is started from 2009and end in 2010. The death ratio was 15,700-575,400.