As of 2020, there have been 50 documented cases of human B virus infection since the identification of the virus in 1932, 21 of which led to death. Early treatment including aciclovir can improve prognosis.

Smallpox, caused by the variola virus, stands as one of the deadliest viruses in human history, responsible for an estimated 300 million deaths in the 20th century alone.

Sep 1, 2025 · Discover the top 10 most deadly viruses in 2025. Learn about the most dangerous diseases, fatality rates, and their global impact on human health.

Jun 26, 2025 · Human immunodeficiency virus, or HIV, has often been cited as the deadliest virus in human history. The World Health Organization (WHO) estimates that between 35.7 and 51.1 million …

Oct 19, 2022 · These are the world's 12 most lethal viruses, based on their mortality rates or the number of people they have killed.

Oct 5, 2025 · In this article, we will explore the 10 most dangerous viruses in human history —those that have caused catastrophic pandemics, challenged medical science, and continue to remind us of our …

The Zaire Ebola virus is the deadliest, with a mortality rate of 90 percent. It is the strain currently spreading through Guinea, Sierra Leone and Liberia, and beyond.

Mar 14, 2024 · Exploring 12 of the World's Most Dangerous Viruses. A spectrum of diseases ranging from mild illnesses to severe, life-threatening conditions.

FastStats is an official application from the Centers for Disease Control and Prevention’s (CDC) National Center for Health Statistics (NCHS) and puts access to topic-specific statistics at your fingertips.

The word “deadly” certainly applies to the virus that causes COVID-19. And yet, epidemiologists hesitate to give SARS-CoV-2 the superlative of deadliest virus in human history.