Yellow fever

            Today I studied the dease called yellow fever and was very bad in the 1700s and 1800s to the Europeans. Today our medicine level is so high that we can just got to the doctor and pick up the vaccination. Back then they couldn't do that and a lot of the population died. Today the middle of South America and africa are very high in yellow fever cases. The reason is the yellow fever is caused by maquestios and those places are full of swamps. Maquestios live in swamps.

 Centers for Disease Control and Prevention. Centers for Disease Control and Prevention, 13 Dec. 2011. Web. 06 Jan. 2, 2013

 "Yellow Fever." Wikipedia. Wikimedia Foundation, 01 July 2014. Web. 07 Jan. 2, 2010