Yellow fever is an acute viral infection transmitted by mosquitoes in tropical sub-Saharan Africa and in the rainforests of tropical South America. Risk to travelers is very low, but high death rates may occur in unvaccinated travelers. Vaccination is about 100% protective in healthy travelers; however, no treatment for the disease exists
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Yellow fever (YF), a viral infection that occurs in tropical sub-Saharan Africa and the rainforests of tropical South America, is acquired through the bite of an infected mosquito.
Risk is low to very low in travelers and depends on the time of year and itinerary. Risk is 10 times greater in Africa than it is in South America.
Symptoms include fever, chills, and muscle aches, which may progress to vomiting, upper abdominal pain, and bleeding.
Consequences of infection in unvaccinated travelers include mental confusion, coma, shock, and multiorgan failure. Death may occur in up to 90% of those infected.
Prevention includes wearing long sleeves and long pants as well as observing personal protective measures against mosquito bites.
YF vaccine is given as a single dose at least 10 days prior to travel (for personal protection or to meet an entry requirement). Some YF-free countries may require vaccination only for travelers coming from another country with risk of YF transmission.
Vaccine side effects are most commonly injection-site reactions. Serious side effects are rare but may include brain inflammation in young children, neurological reactions, and multiple organ dysfunction (first time vaccinees only, mainly persons 60 years and older).
Duration of vaccine protection is long term; a booster dose for personal protection is recommended every 10 years only for persons who will be visiting a high-risk area, travel frequently to risk areas, or may have had an inadequate response to a previous YF vaccination.
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On October 2, 1835, rebellious Texans took shots at Mexican soldiers in the town of Gonzales. It was barely a skirmish, as the Mexicans left the battlefield without attempting to engage the Texans, but nevertheless "the Battle of Gonzales" is considered the first engagement of what would become Texas' War of Independence from Mexico. The battle, however, was only the start of the actual fighting: tensions had been high for years between the Americans who had come to settle Texas and the Mexican authorities. Texas formally declared independence in March of 1836: there were many reasons why they did so.
This is grounded on the enlightenment. The Enlightenment was
a rational and philosophical movement that conquered the world of thoughts in
Europe thru the 18th century, "The Century of Philosophy". The
Enlightenment comprised a variety of notions placed on reason as the main basis
of power and legality, and came to develop ideals like right, growth, broad-mindedness,
group, constitutional government and parting of church and state.
