The global COVID-19 pandemic, caused by severe acute respiratory syndrome coronavirus 2, began with an outbreak in Wuhan, China, in December 2019. It spread to other parts of Asia and then worldwide i
Medical professionals treating a COVID-19 patient in critical condition in an intensive care unit in São Paulo in May 2020
Chinese medics in Huanggang, Hubei, in 2020
Gravediggers bury the body of a man suspected of having died of COVID-19 in the cemetery of Vila Alpina in eastern São Paulo, 3 April 2020.
The deceased in a refrigerated "mobile morgue" outside a hospital in Hackensack, New Jersey, US, in April 2020
In epidemiology, an infection is said to be endemic in a specific population or populated place when that infection is constantly present, or maintained at a baseline level. The term describes the dis
COVID-19 pandemic
…rights. The disease has continued to circulate since 2023. By 2025, experts generally believed the pandemic to be over, having transitioned into the endemic phase. Different definitions of pandemics lead to different determinations of when they end. As of 5 August 2026, COVID-19 has caused 7,115,203 confirmed…
Human alphaherpesvirus 3 virion − a herpesvirus known to infect humans. It causes chickenpox (varicella), a disease most commonly affecting children, teens, and young adults, and shingles (herpes zoster) in adults.