Published: 2018-04-27
Author: Saint Michael’s Hospital | Contact: stmichaelshospital.com
Peer-reviewed publications: N / A
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Summary: New analysis reveals a potential risk for the yellow fever virus to spread to urban centers where it has never been seen before.
According to a new study led by St.
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Main announcement
According to a new study led by St.
Researchers led by Dr. Kamran Khan of St. Michael’s has mapped the worldwide routes of transmission by which the yellow fever virus can spread by analyzing global patterns of people traveling by plane, the environmental conditions needed to let virus transmission within a city and country requirements for travelers to provide proof of yellow fever vaccination upon entry Image source: St. Michael.
Researchers led by Dr. Kamran Khan of St. Michael’s has mapped the worldwide routes of transmission by which the yellow fever virus can spread by analyzing global patterns of people traveling by plane, the environmental conditions needed to let virus transmission within a city and national requirements for travelers to provide proof of yellow fever vaccination upon entry.
Published in the Bulletin of the World Health Organization, the study does not model a specific outbreak, but rather looks at the potential for yellow fever virus to spread between cities around the world. world.
“Imagine the gold rush breaking out like a fire,” said Dr Khan, a scientist at St. Michael, said. “The embers can fly out in different directions, and if they land in the right place, they can start another fire. We studied the global pathways by which the yellow fever virus can spread and how likely it is. potential for new yellow fever outbreaks in urban areas in the world.”
The team of researchers took a global overview of the yellow fever virus. They divide the world into three types of places:
- Endemic area, where yellow fever virus is formed.
- Areas suitable for yellow fever virus transmission have not been found.
- Non-endemic areas where the yellow fever virus is not present and the environment does not appear to be suitable for the virus to spread.
Yellow fever is spread by the bite of the Aedes aegypti mosquito, which can also transmit viruses such as dengue, chikungunya, and Zika.
According to the US Centers for Disease Control and Prevention (CDC), about 15% of people with yellow fever develop a serious illness that can be fatal.
“The yellow fever vaccine is the best protection against yellow fever,” said Dr. Martin Cetron, head of CDC’s Global Migration and Quarantine Division. “The CDC urges anyone traveling to a country where yellow fever is endemic. The yellow fever vaccine is available at a limited number of clinics in the United States, and people with certain illnesses should not get the vaccine. , so visitors should plan ahead.”
Some countries have established policies that require international travelers to provide proof of yellow fever vaccination upon entry. Dr Khan and his team took into account which countries require proof and which currently do not. They then analyzed the travel patterns of the 1.4 billion people who fly through commercial airports around the world.
‘There are different levels of risk depending on where the person is traveling and where they are from,’ Dr Khan said. “In today’s increasingly connected world, one of the main concerns is that the yellow fever virus could be carried by a tourist into a densely populated city where the environmental conditions are necessary. needed to support its transmission, but where the virus has never been seen before. In this context, urban dwellers would essentially have no prior immunity to the virus.”
Through their Analysis, Dr. Khan’s Team found that
- 89% of travelers departing from yellow fever endemic areas to other endemic areas are required to provide proof of vaccination upon entry
- Less than 35 percent of travelers leaving yellow fever endemic areas to cities that appear to be susceptible to yellow fever virus transmission are required to provide proof of vaccination upon entry
- Less than 25 percent of travelers departing from areas of the world that are free of yellow fever virus to areas endemic to yellow fever are required to provide proof of vaccination upon entry
- Brazil, China, India, Mexico, Peru and the United States have the highest numbers of travelers from yellow fever endemic areas and the largest populations live in cities that appear to be suitable for transmission of the virus. withdraw yellow fever
“Now that we have a global view of how the yellow fever virus can travel between cities around the world, countries can re-examine their policies to prevent importation. yellow fever virus, which protects travelers from infection with the virus and thereby prevents exports to Dr. Khan, said Dr. Khan. a particular metropolitan area in the world it will never happen in the future.”
Meanwhile, Dr Khan recommends that travelers remain aware of current requirements for yellow fever vaccination and should have a thorough discussion with their doctor about whether they should get vaccinated. yellow fever before traveling or not.
Reference Source(s):
Researchers map the spread of yellow fever virus to cities around the world | Saint Michael’s Hospital (stmichaelshospital.com). Disability World makes no warranties or representations regarding that matter. Content may have been edited for style, clarity, or length.
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• Cite This Page (APA): St. Michael. (2018, April 27). Researchers have mapped the spread of the yellow fever virus to cities around the world. The world of people with disabilities. Accessed October 16, 2022 from www.disabled-world.com/health/yf-map.php
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