Yellow fever is a virus spread by mosquito bites. You can't get it from close contact with someone who has it. The mosquitoes that spread the infection are found in towns and rural areas. They mainly bite during the day.
Yellow fever is found in most of sub-Saharan Africa, South America, Central America and the Caribbean. Some of these countries require travelers to have a yellow fever vaccination certificate in order to enter the country.
Travelers are advised to take steps to avoid mosquito bites by covering the body in clothing and using insect repellents. Also, you should check the yellow fever vaccination recommendations and requirements before traveling.
The main symptoms of yellow fever are the onset of fever, backache, generalised muscle pain, sensitivity to light, jaundice, nausea, and vomiting. A high proportion of infected individuals die from yellow fever.
It is vital that you check the recommendations and requirements for yellow fever vaccination prior to your travel. Some countries require a yellow fever certificate for entry. Book a consultation in advance to get the full course of vaccine before traveling.