The deadliest viruses on earth
1)Spanish flu
The Spanish flu also known as the 1918 flu pandemic or La Pesadilla, was an unusually deadly influenza pandemic. Lasting from January 1918 to December 1920, it infected 500 million people – about a quarter of the world’s population at the time.
2)H1N1flu
H1N1 flu is also known as swine flu. It’s called swine flu because in the past, the people who caught it had direct contact with pigs. That changed several years ago, when a new virus emerged that spread among people who hadn’t been near pigs. … Swine flu is one of the viruses included in the vaccine.
3)Ebola
A virus that causes severe bleeding, organ failure and can lead to death.
Humans may spread the virus to other humans through contact with bodily fluids such as blood.Initial symptoms include fever, headache, muscle pain and chills. Later, a person may experience internal bleeding resulting in vomiting or coughing blood.Treatment is supportive hospital care.
4)Mers
Middle East respiratory syndrome-related coronavirus, or EMC/2012, is a species of coronavirus which infects humans, bats, and camels. The infecting virus is an enveloped, positive-sense, single-stranded RNA virus which enters its host cell by binding to the DPP4 receptor.
5)Sars
A contagious and sometimes fatal respiratory illness caused by a coronavirus.SARS appeared in 2002 in China. It spread worldwide within a few months, although it was quickly contained. SARS is a virus transmitted through droplets that enter the air when someone with the disease coughs, sneezes or talks. No known transmission has occurred since 2004.
Fever, dry cough, headache, muscle aches and difficulty breathing are symptoms.No treatment exists except supportive care.