Nevertheless, COVID-19 has been declared a public health emergency of international concern by the World Health Organization. More lethal diseases tend to burn out: they kill their hosts too quickly and too effectively to spread, and consequently the virus dies out in the absence of any hosts. COVID-19’s infection rate, somewhat paradoxically, makes it far more dangerous to society at large.
In Sweden, which adopted a " herd immunity" strategy, out of 5837 deaths, only 73 were of people younger than 50 years old. ĭeaths from COVID-19 mostly occur among older people - the median age of COVID-19 death ranges between 79 (USA) and 86 years old (Canada). There have been isolated reports of reinfection, which raise questions regarding long-term immunity. However, scientists have not researched these “lasting health-effects” in depth, as the vast majority of people who test positive (up to 80%) experienced no symptoms whatsoever, leading scientists to prioritise the more severe cases that require hospitalization. Mortality is not the sole cause of concern with COVID-19, as there is also the possibility of lasting health-effects following infection. The World Health Organization (WHO) stated that some studies put the mortality rate at 0.6%, (there is substantial uncertainty about this estimate) which is higher than influenza but significantly lower than other coronavirus infections such as SARS. As of September 2021, this model estimated that the COVID-19 pandemic caused an estimated 9.5 to 18.6 million excess deaths in total (compared with the official death count on of 4.6 million deaths). On May 15, 2021, The Economist unveiled a model to estimate excess deaths worldwide during the pandemic. Since then, SARS-CoV-2 has spread from a relatively small initial-infection to over 451,590,421 cases (and 6,022,047 deaths) as of March 9, 2022.
It was quickly identified as a new disease in January 2020.
were the first to report on the clinical features of the first 41 patients admitted to Wuhan’s Jin Yin-Tan Hospital, who were later confirmed on as being infected with COVID-19. The first cluster of cases, of what was initially thought to be a mysterious case of pneumonia, were reported to the China National Health Commission on December 30, 2019. The virus was first detected in Wuhan, Hubei Province, China in December 2019. The COVID-19 pandemic is an ongoing pandemic caused by the SARS-CoV-2 (formerly 2019-nCoV) coronavirus, which causes the disease called COVID-19.
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