Malaria is one of humanity’s oldest and deadliest diseases. Caused by a parasite transmitted by mosquitoes, it has shaped human history for thousands of years and remains a serious public health challenge today, especially in tropical and subtropical regions. This article looks at where malaria is found around the world, how our understanding of it has developed over time, and the progress being made toward controlling and eventually eliminating it.
How Malaria Spreads
Before the map and the history, it helps to understand the basics. Malaria is caused by Plasmodium parasites, which are transmitted to people through the bites of infected female Anopheles mosquitoes. Several species affect humans, but two matter most. Plasmodium falciparum causes the most severe disease and is responsible for most malaria deaths, and it dominates in Africa. Plasmodium vivax has a wider geographic range and is the main species across much of Asia and the Americas. This difference in species is one reason the malaria map looks so different from one region to another (WHO, 2025).
Historical Overview of Malaria
Malaria has a long and well-documented history, with evidence of its presence going back to ancient times. Descriptions of malaria-like fevers appear in early Chinese, Indian, and Egyptian texts, and the disease was well known to the ancient Greeks, with Hippocrates recording its symptoms and seasonal patterns.
Ancient Civilizations
- China: some of the earliest known references to malaria date to around 2700 BCE in the Chinese medical text known as the Nei Ching, which described symptoms and possible treatments for what was likely malaria.
- India: the Sushruta Samhita, an ancient Indian medical text, also describes malaria-like fevers and even links them to insects.
- Egypt: malaria has been detected in the remains of ancient Egyptian mummies, suggesting the disease was present along the Nile more than 3,000 years ago.
- Greece: around 400 BCE, Hippocrates gave one of the first detailed descriptions of malaria, noting the link between stagnant water and outbreaks of fever.
Middle Ages to Renaissance
Malaria spread widely across Europe, especially in marshy areas, where it became known as “marsh fever.” During the Renaissance, Europeans increasingly recognized the connection between swamps and wetlands and the spread of disease, though the actual cause remained unknown. A major treatment advance came in the 17th century, when the bark of the South American cinchona tree, the source of quinine, began to be used against malarial fevers.
The Colonial Era
European colonization and exploration helped spread malaria and exposed more populations to it across the Americas, Africa, and Asia. The disease had a heavy influence on colonial ventures, including the failure of some early settlements in the Americas.
The Scientific Era: Solving the Mystery
For most of history, no one knew what actually caused malaria. That changed in a remarkable few decades. In 1880, the French physician Alphonse Laveran identified the Plasmodium parasite in the blood of malaria patients, work that later earned him a Nobel Prize. In 1897, the British doctor Ronald Ross demonstrated that mosquitoes transmit the parasite, which won him a Nobel Prize in 1902, and finally explained how the disease moved from person to person.
The 20th century brought new weapons. The insecticide DDT and the drug chloroquine drove major control efforts in the mid-1900s, eliminating malaria from many temperate regions, though resistance later blunted both. A further breakthrough came from the Chinese scientist Tu Youyou, who discovered artemisinin, a powerful antimalarial derived from the sweet wormwood plant (Artemisia annua). Her work earned a Nobel Prize in 2015, and artemisinin-based combination therapies are now the first-line treatment for malaria worldwide.
Global Distribution of Malaria Today
Malaria is now concentrated in tropical and subtropical regions where the Anopheles mosquito thrives. Its distribution is shaped by climate, geography, and socio-economic factors such as poverty and access to healthcare. According to the WHO World Malaria Report 2025, there were an estimated 282 million malaria cases and 610,000 deaths in 2024, spread across roughly 80 countries (WHO, 2025).
Africa
Sub-Saharan Africa carries by far the heaviest burden. In 2024, the WHO African Region accounted for about 94% of all malaria cases and 95% of all malaria deaths worldwide. The toll on children is especially severe: roughly 438,000 African children died from malaria, and children under five made up about 75% of deaths in the region (WHO, 2025). Around 11 African countries account for roughly two-thirds of the global burden, with Nigeria, the Democratic Republic of the Congo, Uganda, Ethiopia, and Mozambique among the highest. Plasmodium falciparum, the most dangerous species, dominates here.
Asia
Malaria remains present across parts of South and Southeast Asia, including India, Indonesia, Myanmar, and the countries of the Greater Mekong region, though many have made strong progress. Plasmodium vivax is common in this region. Notably, the Greater Mekong is also where artemisinin resistance first emerged, making it a key area for drug-resistance monitoring.
The Americas
In Latin America, malaria transmission continues mainly in the Amazon basin, affecting countries such as Brazil, Venezuela, Colombia, and Peru. Plasmodium vivax predominates. Several countries in the region have recently eliminated the disease, including Paraguay, Argentina, El Salvador, Belize, and Suriname.
Eastern Mediterranean
Malaria persists in a handful of Eastern Mediterranean countries, with Sudan, Yemen, Pakistan, and Afghanistan among the most affected. Conflict and humanitarian crises have driven case increases in several of these countries in recent years.
Oceania
Malaria is endemic in Papua New Guinea, the Solomon Islands, and parts of Indonesia. Both Plasmodium falciparum and Plasmodium vivax are present, and significant public health efforts are aimed at control and elimination.
Malaria-Free Regions
Much of the world is now free of the disease. The WHO European Region has had no malaria transmission since 2015, and North America, most of the Caribbean, East Asia, and Australia are malaria-free. As of 2025, a total of 47 countries and one territory have been certified malaria-free by WHO.
Global Distribution at a Glance
| Region | Status in 2024 |
| Sub-Saharan Africa | Highest burden: ~94% of cases, ~95% of deaths |
| South/Southeast Asia | Ongoing transmission: strong progress in many countries |
| Latin America | Transmission mainly in the Amazon basin |
| Eastern Mediterranean | Persists in conflict-affected countries |
| Oceania | Endemic in Papua New Guinea and nearby islands |
| Europe | Malaria-free since 2015 |
Malaria Vaccines: A New Chapter
One of the biggest developments in malaria’s long history has arrived only recently: working vaccines. RTS, S/Mosquirix, the first malaria vaccine, was recommended by the WHO in 2021 after pilot programs in Ghana, Kenya, and Malawi. A second vaccine, R21/Matrix-M, was recommended in October 2023 and prequalified that December. R21 showed roughly a 75% reduction in symptomatic malaria over 12 months in trials, and both vaccines are now being rolled out for young children across more than 20 African countries. Given as a series of doses to children from around five months of age, they add a powerful new tool to bed nets, chemoprevention, and antimalarial drugs (WHO; PATH, 2023 to 2025).
Progress and Ongoing Challenges
The long view is encouraging. Since 2000, an estimated 2.3 billion malaria cases and 14 million deaths have been averted worldwide, including about 1 million lives saved in 2024 alone (WHO, 2025). Yet progress has stalled in recent years, with cases rising slightly since 2023, driven by surges in countries such as Ethiopia, Madagascar, and Yemen.
Several challenges stand in the way of further progress:
- Drug resistance: artemisinin resistance is increasingly reported in East Africa, threatening the effectiveness of first-line treatment.
- Insecticide resistance: mosquitoes are becoming resistant to the insecticides used in bed nets and spraying.
- Funding gaps: global malaria funding sits around $4 billion a year, well short of the roughly $8.3 billion estimated as needed to stay on track toward elimination.
- Fragile settings: conflict, displacement, and weak health systems keep the disease entrenched in the hardest-hit areas.
Conclusion
The history and distribution of malaria tell a story of both remarkable progress and stubborn challenge. From ancient descriptions in China, India, and Egypt to the scientific breakthroughs that revealed its cause, and now to the first effective vaccines, humanity’s understanding of malaria has come a long way. The disease has been pushed out of much of the world, yet it still claims over half a million lives a year, most of them young children in sub-Saharan Africa. Continued investment in research, prevention, and health systems, along with new tools like vaccines, will be essential to overcome the remaining hurdles and move toward the ultimate goal of eradication.
Frequently Asked Questions
Where is malaria most common today?
Malaria is most common in sub-Saharan Africa, which accounted for about 94% of cases and 95% of deaths worldwide in 2024. It also persists in parts of South and Southeast Asia, the Amazon basin in Latin America, conflict-affected Eastern Mediterranean countries, and Oceania (WHO, 2025).
How many people get malaria each year?
The WHO estimated about 282 million malaria cases and 610,000 deaths globally in 2024. Most deaths are among children under five in Africa, though since 2000 an estimated 2.3 billion cases and 14 million deaths have been averted (WHO World Malaria Report 2025).
Who discovered that mosquitoes transmit malaria?
Ronald Ross demonstrated in 1897 that mosquitoes transmit the malaria parasite, earning a Nobel Prize in 1902. Earlier, in 1880, Alphonse Laveran had identified the Plasmodium parasite itself.
Is there a vaccine for malaria?
Yes. Two vaccines are now in use: RTS, S/Mosquirix, recommended by WHO in 2021, and R21/Matrix-M, recommended in 2023. Both are being rolled out for young children across more than 20 African countries.
