The vaccines, which looked like the salvation of 2021, worked but weren’t enough to rescue us. If we’re going to save 2022, we’ll also have to embrace masking, testing, and maybe staying home sometimes, what epidemiologists broadly call nonpharmaceutical interventions, or NPIs.
Acknowledging that complexity will let us practice for the day Covid settles into a circulating, endemic virus.
So why did the first SARS virus from 2003 (SARS-CoV) go extinct while this one (SARS-CoV-2) may become endemic?
Before focusing on endemic species, let's look at the definition of endemism. Endemism is a term used in biology to talk about the distribution of a taxon limited to a small geographic area and which can therefore be found naturally in this place.
What will a world with endemic 2019-nCoV — circulating permanently in the human population — be like?
... we discuss the emergence of the endemic coronaviruses, what they may tell us about the epidemiology and immunology of SARS-CoV-2, and introduce our new range of HCoV cell lysates for the development of highly specific immunoassays.
The term “endemic” is actually part of a sliding scale of sorts when it comes to disease classifications.
The expectation that COVID-19 will become endemic essentially means that the pandemic will not end with the virus disappearing; instead, the optimistic view is that enough people will gain immune protection from vaccination and from natural infection such that there will be less transmission and much less COVID-19-related hospitalization and death, even as the virus continues to circulate.
The words pandemic, epidemic and endemic often come to public attention in relation to infectious diseases. They share a common root from the Ancient Greek word demos (people), but have distinct meanings. This can be seen clearly in relation to the rise and spread of covid-19.
Polio remains endemic in two countries Afghanistan and Pakistan. Until poliovirus transmission is interrupted in these countries, all countries remain at risk of importation of polio, especially vulnerable countries with weak public health and immunization services and travel or trade links to endemic countries.