What shape is yellow fever virus?
What shape is yellow fever virus?
Yellow fever virus is an enveloped virus in the form of an icosahedral capsid (spherical shape), belonging to the Flaviviridae family.
Where does yellow fever usually occur in the world?
Most cases of yellow fever occur in sub-Saharan Africa and tropical South America. Humans and monkeys are most commonly infected with the yellow fever virus. Mosquitoes transmit the virus back and forth between monkeys, humans or both.
What are the first symptoms of yellow fever?
Yellow fever develops quickly, with symptoms occurring three to six days after exposure. The initial symptoms of the infection are similar to those of the influenza virus. They include: headaches. muscle aches.
What are the three types of transmission of yellow fever?
There are 3 types of transmission cycles: Sylvatic (or jungle) yellow fever: In tropical rainforests, monkeys, which are the primary reservoir of yellow fever, are bitten by wild mosquitoes which pass the virus on to other monkeys. Occasionally humans working or travelling in the forest are bitten by infected mosquitoes and develop yellow fever.
Who is most at risk for yellow fever?
estimates that 50 percent of people who develop severe symptoms of this condition will die. Older adults and those with compromised immune systems are most at risk for serious complications. How Is Yellow Fever Prevented? Vaccination is the only way to prevent yellow fever. The vaccine for yellow fever is given as a single shot.
How big is the yellow fever virus in centimeters?
Yellow fever virus is a type of flavivirus, a small, enveloped virus whose diameter ranges in size from 40 to 60 nm. That means flaviviruses are 40,000,000 times smaller than a centimeter, which is about the width of a small screw.
Yellow fever develops quickly, with symptoms occurring three to six days after exposure. The initial symptoms of the infection are similar to those of the influenza virus. They include: headaches. muscle aches.
Most cases of yellow fever occur in sub-Saharan Africa and tropical South America. Humans and monkeys are most commonly infected with the yellow fever virus. Mosquitoes transmit the virus back and forth between monkeys, humans or both.
estimates that 50 percent of people who develop severe symptoms of this condition will die. Older adults and those with compromised immune systems are most at risk for serious complications. How Is Yellow Fever Prevented? Vaccination is the only way to prevent yellow fever. The vaccine for yellow fever is given as a single shot.