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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 infections, an attack rate in excess of 15 cases per 100,000 people for two consecutive weeks is considered an epidemic. [1]
The index case-patient was a hunter who lived in a forest timber camp. The disease was spread by close contact with infected persons. A dead chimpanzee found in the forest at the time was determined to be infected. [21] Oct 2000–Jan 2001 Uganda: SUDV 425 224 53% Occurred in the Gulu, Masindi, and Mbarara districts of Uganda.
At the beginning of March 2022, South Korea joined the list of 30 most affected countries on the first anniversary of the day when it overtook China in terms of the number of cases. As of 3 February 2025, France is the most affected country in Europe , while Germany is the second most affected country and the United Kingdom the third most ...
It spread to other areas of Asia, and then worldwide in early 2020. The figures presented are based on reported cases and deaths. While in several high-income countries the ratio of total estimated cases and deaths to reported cases and deaths is low and close to 1, for some countries it may be more than 10 [ 7 ] or even more than 100. [ 8 ]
The first case involving XBB in England was detected from a specimen sample taken on 10 September 2022 and further cases have since been identified in most English regions. By the end of the year, XBB.1.5 accounted for 40.5% of new cases across the US, and was the dominant strain; variant of concern BQ.1 was running at 18.3% and BQ.1.1 ...
Sexually transmitted infections (STIs), also referred to as sexually transmitted diseases (STDs), are infections that are commonly spread by sexual activity, especially vaginal intercourse, anal sex and oral sex. [1] [2] The most prevalent STIs may be carried by a significant fraction of the human population.
The disease spread rapidly through the rest of the spring, and by 3 May, a total of 787 confirmed cases had been reported worldwide. [ 101 ] On 11 June 2009, the ongoing outbreak of Influenza A/H1N1, commonly referred to as swine flu, was officially declared by the WHO to be the first influenza pandemic of the 21st century and a new strain of ...
This epidemic curve shows a presumed first case, known as the index case on November 6, 1978. 4 days later, there was a steep increase in cases, followed by the curve tapering down to zero. Some cases were food handlers, and some secondary cases. It showed that this is probably a common source outbreak.