A year and a half after the first news about
strange pneumonia in Wuhan
, and as unheard of as it may be,
we still do not know the origin of the virus that has devastated the world economy and has already killed 3.3 million people
.
In previous coronavirus epidemics, scientists quickly found evidence of the virus leaping from bat to man via civets (SARS-1) and camels (MERS).
In the case of SARS-2, no one has yet found either the reservoir animal or e
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