>"Hard to find" is not the same as "vanished".

Which is strange for a virus as you stated. "found to have jumped to quite a few other animals; cats, dogs, hippos, anteaters, manatees; it's clearly not picky". So why is it so hard to find the virus that spilled over into humans, this virus would have been better adapted towards their own species and would have not been replaced by the human variants. We find SARS circulating in animals all the time, but they all descend from the human variant.

It is the Immaculate Infection!