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The index case or patient zero is the first documented patient in a disease epidemic within a population, [1] or the first documented patient included in an epidemiological study. [2] It can also refer to the first case of a condition or syndrome (not necessarily contagious) to be described in the medical literature, whether or not the patient ...
is the average number of people infected from one other person. For example, Ebola has an of two, so on average, a person who has Ebola will pass it on to two other people.. In epidemiology, the basic reproduction number, or basic reproductive number (sometimes called basic reproduction ratio or basic reproductive rate), denoted (pronounced R nought or R zero), [1] of an infection is the ...
An epidemic curve, also known as an epi curve or epidemiological curve, is a statistical chart used in epidemiology to visualise the onset of a disease outbreak. It can help with the identification of the mode of transmission of the disease. It can also show the disease's magnitude, whether cases are clustered or if there are individual case ...
Contact interview: The index case is interviewed to learn about their movements, whom they have been in close contact with or who their sexual partners have been. [7] Depending on the disease and the context of the infection, family members, health care providers, and anyone else who may have knowledge of the case's contacts may also be ...
The index case for the outbreak is believed to be a 27-year-old man who was being treated at King Faisal Hospital in Kigali after being exposed to the virus from contact with bats. [14] On 28 September 2024, the World Health Organization was informed of a first ever Marburg virus disease outbreak in Rwanda. [15]
Human infectious diseases may be characterized by their case fatality rate (CFR), the proportion of people diagnosed with a disease who die from it (cf. mortality rate).It should not be confused with the infection fatality rate (IFR), the estimated proportion of people infected by a disease-causing agent, including asymptomatic and undiagnosed infections, who die from the disease.
An index case, also known as a patient zero, is an individual believed to be the initial case of a condition or syndrome as described in medical literature. Pages in category "Index cases" The following 9 pages are in this category, out of 9 total.
Researchers generally believe that a one-year-old boy, [4] later identified as Emile Ouamouno, who died in December 2013 in the village of Meliandou, Guéckédou Prefecture, Guinea, was the index case of the Ebola virus disease epidemic. [5] [6] His mother, sister, and grandmother then became ill with similar symptoms and also died. People ...