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Endemic COVID-19
There is disagreement as to whether COVID-19 has become an endemic disease or should still be considered a pandemic. This transition has made COVID-19 data more difficult to track. The observed behavior of SARS-CoV-2, the virus that causes COVID-19, suggests it is unlikely it will die out, and the lack of a COVID-19 vaccine that provides long-lasting immunity against infection means it cannot immediately be eradicated; thus, transition to an endemic phase was probable. In an endemic phase, people continue to become infected and ill, but in relatively stable numbers. Such a transition was thought to take years or decades. Precisely what would constitute an endemic phase is contested.
Endemic is a frequently misunderstood and misused word outside the realm of epidemiology. Endemic does not mean mild, or that COVID-19 must become a less hazardous disease. The severity of endemic disease would be dependent on various factors, including the evolution of the virus, population immunity, and vaccine development and rollout.
COVID-19 endemicity is distinct from the COVID-19 public health emergency of international concern, which was ended by the World Health Organization on 5 May 2023. Some politicians and commentators have conflated what they termed endemic COVID-19 with the lifting of public health restrictions or a comforting return to pre-pandemic normality.
As of 2024, experts were in disagreement as to whether COVID-19 had yet become endemic. The transition point of a pandemic into an endemic state is not well-defined, and whether this has occurred differs according to the definitions used.
An infectious disease is said to be endemic when the number of infections is predictable. This includes diseases with infection rates that are predictably high (called hyperendemic), as well as diseases with infection rates that are predictably low (called hypoendemic). Endemic does not mean mild: a disease with a stable infection rate can be associated with any level of disease severity and any mortality rate among infected people. Endemic COVID-19 is not a synonym for COVID-19 infection becoming safe, or for mortality and morbidity becoming less of a problem. The prevalence and resulting disease burden is dependent on factors such as how quickly new variants emerge, the uptake of COVID-19 vaccines, and changes to disease virulence (a factor that depends on both the virus's own characteristics and people's immunity against it), rather than being dependent on endemicity.
Generally speaking, all new emerging infectious diseases have five potential outcomes:
Additionally, if an infectious disease becomes endemic, there is no guarantee that the disease will remain endemic forever. A disease that is usually endemic can become epidemic or pandemic in the future. For example, in some years, influenza becomes a pandemic, even though it is not usually a pandemic.
During the course of the COVID-19 pandemic, it became apparent that the SARS-CoV-2 virus was unlikely to die out. Eradication is widely believed to be impossible, especially in the absence of a vaccine that provides long-lasting immunity against infection from COVID-19.
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Endemic COVID-19 AI simulator
(@Endemic COVID-19_simulator)
Endemic COVID-19
There is disagreement as to whether COVID-19 has become an endemic disease or should still be considered a pandemic. This transition has made COVID-19 data more difficult to track. The observed behavior of SARS-CoV-2, the virus that causes COVID-19, suggests it is unlikely it will die out, and the lack of a COVID-19 vaccine that provides long-lasting immunity against infection means it cannot immediately be eradicated; thus, transition to an endemic phase was probable. In an endemic phase, people continue to become infected and ill, but in relatively stable numbers. Such a transition was thought to take years or decades. Precisely what would constitute an endemic phase is contested.
Endemic is a frequently misunderstood and misused word outside the realm of epidemiology. Endemic does not mean mild, or that COVID-19 must become a less hazardous disease. The severity of endemic disease would be dependent on various factors, including the evolution of the virus, population immunity, and vaccine development and rollout.
COVID-19 endemicity is distinct from the COVID-19 public health emergency of international concern, which was ended by the World Health Organization on 5 May 2023. Some politicians and commentators have conflated what they termed endemic COVID-19 with the lifting of public health restrictions or a comforting return to pre-pandemic normality.
As of 2024, experts were in disagreement as to whether COVID-19 had yet become endemic. The transition point of a pandemic into an endemic state is not well-defined, and whether this has occurred differs according to the definitions used.
An infectious disease is said to be endemic when the number of infections is predictable. This includes diseases with infection rates that are predictably high (called hyperendemic), as well as diseases with infection rates that are predictably low (called hypoendemic). Endemic does not mean mild: a disease with a stable infection rate can be associated with any level of disease severity and any mortality rate among infected people. Endemic COVID-19 is not a synonym for COVID-19 infection becoming safe, or for mortality and morbidity becoming less of a problem. The prevalence and resulting disease burden is dependent on factors such as how quickly new variants emerge, the uptake of COVID-19 vaccines, and changes to disease virulence (a factor that depends on both the virus's own characteristics and people's immunity against it), rather than being dependent on endemicity.
Generally speaking, all new emerging infectious diseases have five potential outcomes:
Additionally, if an infectious disease becomes endemic, there is no guarantee that the disease will remain endemic forever. A disease that is usually endemic can become epidemic or pandemic in the future. For example, in some years, influenza becomes a pandemic, even though it is not usually a pandemic.
During the course of the COVID-19 pandemic, it became apparent that the SARS-CoV-2 virus was unlikely to die out. Eradication is widely believed to be impossible, especially in the absence of a vaccine that provides long-lasting immunity against infection from COVID-19.