Flaviviruses are named for the yellow fever virus - "flavus" means "yellow" in Latin. (Yellow fever was named because it often caused yellow-colored skin, called jaundice, in its victims.) Flaviviruses share a common size (40-65 nm) and symmetry (shape), and they look similar under an electron microscope. They are made of single-stranded RNA.
Yellow fever peaked in 1842, killing hundreds of people. There was an outbreak in Philadelphia in 1793. Yellow fever is spread through the bite of an infected mosquito. The name of the mosquito which commonly carries the virus is Aedes Aegypti. The female carries the disease. The yellow fever originated in central Africa.
The Spanish flu , also known as the 1918 flu pandemic , was an unusually deadly influenza pandemic caused by the H1N1 influenza A virus . Lasting from February 1918 to April 1920, it infected 500 million people–about a third of the world's population at the time–in four successive waves. The death toll is typically estimated to have been somewhere between 17 million and 50 million, making ...
Yellow fever has been a source of several devastating epidemics. During one of Napoleon's campaigns to Japan in 1802, his troops were attacked by yellow fever on a grand scale. More than half of the army perished due to the disease.
Yellow_fever_Africa_2005.png (532 × 562 pixel, file size: 63 KB, MIME type: image/png) Yellow fever : Endemic zones in Africa, 2005. Obtained from the CDC / National Centre for Infectious Disease Traveler's Health: Yellow Book.
Yellow fever vaccine is a vaccine that protects against yellow fever. Yellow fever is a viral infection that occurs in Africa and South America. Most people begin to develop immunity within ten days and 99 percent are protected within one month of vaccination, and this appears to be lifelong.
Jaundice (also called icterus) is when the skin and the whites of the eyes become a yellow color. People with jaundice have a problem with their liver, which stops it from removing heme properly. Heme (from hemoglobin) changes to a chemical called bilirubin after red blood cell death. Bilirubin causes the yellow coloring of the skin.
In 1882, in response to a virulent outbreak of yellow fever in Brownsville, Texas, and in northern Mexico, a cordon sanitaire was established 180 miles north of the city, terminating at the Rio Grande to the west and the Gulf of Mexico to the east. People traveling north had to remain quarantined at the cordon for 10 days before they were ...
The yellow fever virus is found in tropical and subtropical areas of Africa and South America. The virus is spread to people by the bite of an infected mosquito. Yellow fever is a very rare cause of illness in U.S. travelers. Illness ranges from a fever with aches and pains to severe liver disease with bleeding and yellowing skin (jaundice).
Dengue fever (pronounced "DEN-gi") is a tropical infectious disease caused by the dengue virus.People get the dengue virus from mosquitoes.Dengue fever is also called break-bone fever, because it can cause so much pain that people feel like their bones are breaking.