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This is a list of the largest known epidemics and pandemics caused by an infectious disease in humans. Widespread non-communicable diseases such as cardiovascular disease and cancer are not included. An epidemic is the rapid spread of disease to a large number of people in a given population within a short period of time; in meningococcal ...
Coronaviruses. 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.
v. t. e. The symptoms of COVID-19 are variable depending on the type of variant contracted, ranging from mild symptoms to a potentially fatal illness. [ 1][ 2] Common symptoms include coughing, fever, loss of smell (anosmia) and taste (ageusia), with less common ones including headaches, nasal congestion and runny nose, muscle pain, sore throat ...
Epstein–Barr virus infectious mononucleosis (Mono) Fever – usually lasting 14 days; often mild. Sore throat – usually severe for 3–5 days, before resolving in the next 7–10 days. Swollen glands – mobile; usually located around the back of the neck (posterior cervical lymph nodes) and sometimes throughout the body.
The infection of new-born chicks was characterized by gasping and listlessness with high mortality rates of 40–90%. [ 16] Leland David Bushnell and Carl Alfred Brandly isolated the virus that caused the infection in 1933. [ 17] The virus was then known as infectious bronchitis virus (IBV).
A viral disease (or viral infection) occurs when an organism's body is invaded by pathogenic viruses, and infectious virus particles (virions) attach to and enter susceptible cells. [ 1] Examples are the common cold, gastroenteritis and pneumonia. [ 2]
SARS-CoV-2 is the seventh known coronavirus to infect people, after 229E, NL63, OC43, HKU1, MERS-CoV, and the original SARS-CoV. [105] Like the SARS-related coronavirus implicated in the 2003 SARS outbreak, SARS‑CoV‑2 is a member of the subgenus Sarbecovirus (beta-CoV lineage B). [106] [107] Coronaviruses undergo frequent recombination. [108]
For the Netherlands, based on overall excess mortality, an estimated 20,000 people died from COVID-19 in 2020, [ 9] while only the death of 11,525 identified COVID-19 cases was registered. [ 8] The official count of COVID-19 deaths as of December 2021 is slightly more than 5.4 million, according to World Health Organization's report in May 2022.