Tanzania vs. Burundi

Tanzania has the largest population in East Africa and the lowest population density; almost a third of the population is urban. Tanzania's youthful population - about two-thirds of the population is under 25 - is growing rapidly because of the high total fertility rate of 4.8 children per woman. Progress in reducing the birth rate has stalled, sustaining the country's nearly 3% annual growth. The maternal mortality rate has improved since 2000, yet it remains very high because of early and frequent pregnancies, inadequate maternal health services, and a lack of skilled birth attendants - problems that are worse among poor and rural women. Tanzania has made strides in reducing under-5 and infant mortality rates, but a recent drop in immunization threatens to undermine gains in child health. Malaria is a leading killer of children under 5, while HIV is the main source of adult mortality

For Tanzania, most migration is internal, rural to urban movement, while some temporary labor migration from towns to plantations takes place seasonally for harvests. Tanzania was Africa's largest refugee-hosting country for decades, hosting hundreds of thousands of refugees from the Great Lakes region, primarily Burundi, over the last fifty years. However, the assisted repatriation and naturalization of tens of thousands of Burundian refugees between 2002 and 2014 dramatically reduced the refugee population. Tanzania is increasingly a transit country for illegal migrants from the Horn of Africa and the Great Lakes region who are heading to southern Africa for security reasons and/or economic opportunities. Some of these migrants choose to settle in Tanzania.

Burundi is a densely populated country with a high population growth rate, factors that combined with land scarcity and poverty place a large share of its population at risk of food insecurity. About 90% of the population relies on subsistence agriculture. Subdivision of land to sons, and redistribution to returning refugees, results in smaller, overworked, and less productive plots. Food shortages, poverty, and a lack of clean water contribute to a 60% chronic malnutrition rate among children. A lack of reproductive health services has prevented a significant reduction in Burundi's maternal mortality and fertility rates, which are both among the world's highest. With two-thirds of its population under the age of 25 and a birth rate of about 6 children per woman, Burundi's population will continue to expand rapidly for decades to come, putting additional strain on a poor country.

Historically, migration flows into and out of Burundi have consisted overwhelmingly of refugees from violent conflicts. In the last decade, more than a half million Burundian refugees returned home from neighboring countries, mainly Tanzania. Reintegrating the returnees has been problematic due to their prolonged time in exile, land scarcity, poor infrastructure, poverty, and unemployment. Repatriates and existing residents (including internally displaced persons) compete for limited land and other resources. To further complicate matters, international aid organizations reduced their assistance because they no longer classified Burundi as a post-conflict country. Conditions have deteriorated since renewed violence erupted in April 2015, causing another outpouring of refugees. In addition to refugee out-migration, Burundi has hosted thousands of refugees from neighboring countries, mostly from the Democratic Republic of the Congo and lesser numbers from Rwanda.