CDC Travel Notices
Alert – Yellow Fever in Nigeria
Yellow fever is caused by a virus. The virus is spread to people by mosquito bites. Symptoms of yellow fever include fever, chills, headache, backache, and muscle aches. Symptoms take 3–6 days to develop after infection. About 15% of people who get yellow fever develop serious illness including bleeding, shock, organ failure, and sometimes death.
Read the original notice at Centers for Disease Control and Prevention (CDC)