Ebola started in 1976 with two simultaneous outbreaks in Africa: one in Sudan, linked to cotton factory workers, and another in Yambuku, Zaire (now DRC), near the Ebola River, linked to contaminated medical practices at a mission hospital, spreading through reused needles and infected body fluids during funerals, revealing two different virus species and highlighting the urgent need for better healthcare and understanding the animal reservoir (likely fruit bats).
The first human EBOD case in the West Africa outbreak (2014 to 2016) was likely infected via exposure to bats. In addition to bats, EBOD has also been documented in people who handled infected chimpanzees, gorillas and forest antelopes, both dead and alive, in Cote d'Ivoire, the Republic of the Congo and Gabon.
It was from a Belgian doctor based in what was then Zaire, now the Democratic Republic of Congo - his handwritten message explained that the blood was that of a nun, also from Belgium, who had fallen ill with a mysterious illness which he couldn't identify.
Ebola disease was first identified in 1976 after an outbreak in what is now the Democratic Republic of Congo. Since then, these viruses have emerged periodically from the unknown animal that carries them and infected people in several African countries.
Zaire Ebola
The 44-year-old school headmaster, Mabalo Lokela, sought medical treatment at the Yambuku Mission Hospital for a fever he, as well as the nurses, attributed to malaria. After receiving chloroquine by parenteral injection his fever resolved, but returned rapidly after September first.
In the Democratic Republic of the Congo
On September 4, 2025, the DRC Ministry of Public Health officially declared an outbreak of Ebola in Bulape health zone in Kasai Province. As of November 5, 2025, there are 64 people with confirmed or probable Ebola, which includes 45 deaths.
While precise numbers are impossible, Tuberculosis (TB) is estimated to have killed the most humans in history, with around 1 billion deaths, followed by Smallpox, which killed hundreds of millions (300-500M in 20th century alone), and Malaria, a persistent killer since antiquity, with some sources suggesting it affected half of all people ever to live, though definitive figures are elusive.
Research suggests that fruit bats are most likely the original hosts of the Ebola virus. Other animals that have been infected include chimpanzees, gorillas, monkeys, forest antelope and porcupines. There is no evidence that mosquitoes or other insects transmit the Ebola virus.
It is true that about 8% of the human genome consists of remnants of ancient retroviruses, known as endogenous retroviruses (ERVs). However, these viral sequences are nonfunctional fossil DNA, the result of infections that integrated into germline cells millions of years ago. Over time, mutations have inactivated them.
It specifically referred to the poisonous sap of certain plants, which explains why it sounds similar to viscous, a word meaning "sticky." Nowadays, it's used to describe something that causes infectious diseases, specifically a tiny, self-replicating agent made up of genetic material and protein.
The main cutaneous finding of Ebola is a nonspecific maculopapular rash that appears between day four and six of disease. Patients have "ghost-like" features, and the rash initially presents on the upper arms, flexor forearms, and upper legs, sometimes in a centripetal fashion.
Occurred in the Orientale Province. This was the most severe Ebola outbreak in recorded history in regards to both the number of human cases and fatalities. It began in Guéckédou, Guinea, in December 2013 and spread abroad. Flare-ups of the disease continued into 2016, and the outbreak was declared over on 9 June 2016.
Intense contact tracing and strict isolation largely prevented further spread of the disease in the countries that had imported cases. It caused significant mortality, with a considerable case fatality rate.
The virus is transmitted to people from wild animals and spreads in the human population through human-to-human transmission. The average EVD case fatality rate is around 50%. Case fatality rates have varied from 25% to 90% in past outbreaks.
Lack of preparation: Before 2014, West African countries had never experienced an Ebola outbreak, and they were unprepared for the disease. Because the virus reached West African capital cities, the world saw how fast Ebola can spread in an urban center without preparation.
Ebola virus is classified as a filovirus and looks worm-like on electron microscopy. The virus's natural hosts are probably various species of fruit bats [20]. It was first described in 1976 in both South Sudan and the Democratic Republic of the Congo.
'It's completely out of control': Scientists warn bird flu could spark a human pandemic in 2026. The Transmission. University of Nebraska Medical Center.
But in fact, viruses play numerous crucial biological roles at multiple scales, from individual cells to entire ecosystems. Without viruses, life on Earth would be very different, or perhaps there would be no life at all.
Saying humans are 98% chimpanzee means we share nearly all our DNA with chimps, reflecting our very recent common ancestor, while saying we're 50% banana means we share about half our genes, but these are ancient, fundamental genes for basic cell functions (like making energy), showing the deep evolutionary link between all life from a distant common ancestor, not that we're physically half-fruit. It's a comparison of different types of genetic similarities, highlighting our close primate cousinship versus our shared fundamental biology with plants, according to Pfizer.
In contrast to humans, rodents are protected from disease on infection with ebolaviruses, although adapted versions of some of the viruses are lethal in mice, hamsters and guinea pigs.
Rabies virus has a characteristic bullet-shaped virion structure. Rabies virus infection in mammals is nearly 100% fatal if left untreated.
Ebola is not generally spread through food, but the hunting, butchering, and processing of bush meat brings people into contact with blood and other fluids of potentially infected animals.
Huntington disease is an inherited, neurodegenerative disorder. If a parent has the condition, each child will have a 50% chance of developing the disease.
The film follows a tween boy at a water polo camp who soon finds himself the victim of a cruel tradition. The tradition is the rumor that he has a plague, an infectious disease that is contagious if the subject is not shunned. This functions as an allegory for isolation and exclusion.
The number one killer in the world is cardiovascular disease (CVD), including heart disease and stroke, responsible for about one-third of all global deaths, claiming nearly 18-20 million lives annually, and remains the leading cause across all regions, according to WHO and World Heart Federation. While COVID-19 caused significant deaths in recent years, CVD has consistently held the top spot for decades, with increases seen globally, especially in younger populations.