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108 countries and territories with more cases than mainland China. North Korea was the most recent country to overtake China in terms of the number of cases while Hong Kong was the most recent territory. 223 countries and territories with at least 100 cases. In some of those countries, it took 20 days to reach 100.
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 virus was confirmed to have spread to Brazil on 25 February 2020, [376] when a man from São Paulo who had travelled to Italy tested positive for the virus. [377] The disease had spread to every federative unit of Brazil by 21 March. On 19 June 2020, the country reported its one millionth case and nearly 49,000 reported deaths.
The first human cases of COVID-19 occurred in Wuhan, People's Republic of China, on or about 17 November 2019. [2] The first confirmed human case in the United States was on 19 January 2020. The World Health Organization declared the COVID-19 outbreak a Public Health Emergency of International Concern (PHEIC) on 30 January 2020, and first ...
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]
[16] [87] Such crowded conditions enable the virus to spread easily via aerosols, [11] they can create clusters of cases, where infections can be traced back to an index case or geographical location. [18] Another important site for transmission is between members of the same household, [16] as well as hospitals due to the abundance of ...
The number of cases varies according to the disease-causing agent, and the size and type of previous and existing exposure to the agent. Outbreaks include many epidemics , which term is normally only for infectious diseases , as well as diseases with an environmental origin, such as a water or foodborne disease .
[65] [66] Scientists have also found cases of H5N1 of clade 2.3.4.4b in common bottlenose dolphins from Florida. [67] On April 26, the FDA reported the virus had spread to cow herds in nine states, including Colorado, with one in five U.S. commercial milk samples testing positive for traces of bird flu.