SARS-CoV-2 Pandemic: Not the First, Not the Last
Calistri, Paolo | Decaro, Nicola | Lorusso, Alessio
The common trait among the betacoronaviruses that emerged during the past two decades (the severe acute respiratory syndrome coronavirus—SARS-CoV, the Middle East respiratory syndrome coronavirus—MERS-CoV, and the recent SARS coronavirus 2—SARS-CoV-2) is their probable animal origin, all deriving from viruses present in bat species. Bats have arisen the attention of the scientific community as reservoir of emerging viruses, given their wide geographical distribution, their biological diversity (around 1400 species, 21 different families and over 200 genera), and their peculiar ecological and physiological characteristics which seem to facilitate them in harbouring a high viral diversity. Several human activities may enable the viral spill-over from bats to humans, such as deforestation, land-use changes, increased livestock grazing or intensive production of vegetal cultures. In addition, the globalization of trade and high global human mobility allow these viruses to be disseminated in few hours in many parts of the World. In order to avoid the emergence of new pandemic threats in the future we need to substantially change our global models of social and economic development, posing the conservation of biodiversity and the preservation of natural ecosystems as a pillar for the protection of global human health.
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