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A COVID-19 vaccine is intended to provide acquired immunity against severe acute respiratory syndrome coronavirus 2 (SARS‑CoV‑2), the virus that causes coronavirus disease 2019 . Prior to the COVID-19 pandemic, an established body of knowledge existed about the structure and function of coronaviruses causing diseases like severe acute ...
The plague went on to eliminate a quarter to half the human population of the known world and was identified in 2013 as being caused by bubonic plague. [78] [79] Black Death (1331 to 1353): Also known as the Second Plague Pandemic. The total number of deaths worldwide is estimated at 75 to 200 million.
Bubonic plague 15–100 million 25–60% of European population [5] 541–549 North Africa, Europe, and Western Asia 3 HIV/AIDS pandemic: HIV/AIDS: 44 million (as of 2025) [a] 1981–present [6] Worldwide 1 Black Death: Bubonic plague: 25–50 million 30–60% of European population [7] 1346–1353 Europe, Asia, and North Africa 5 COVID-19 pandemic
The director of the World Health Organization declared Friday that the coronavirus emergency was “over,” after three years of a world transformed by the COVID-19 pandemic, which killed at ...
A quadruple whammy of viruses – flu, COVID, norovirus, and respiratory syncytial virus, or RSV – is hitting the U.S. as the year comes to a close. The Centers for Disease Control and ...
Dec. 30—As vaccinations were made more available this past January, the COVID-19 virus fought back. Niagara County Department of Health Commissioner Dan Stapleton was frank. "The surge is upon ...
White House pandemic response coordinator Dr. Ashish Jha delivered a grim message on Friday about the ever-evolving coronavirus pathogen that the Centers for Disease Control and Prevention ...
Coronavirus diseases are caused by viruses in the coronavirus subfamily, a group of related RNA viruses that cause diseases in mammals and birds. In humans and birds, the group of viruses cause respiratory tract infections that can range from mild to lethal.