In this Jan 25, 2020 pre-print from Wuhan there is no mention of Prevotella in the main paper, they ignore the Prevotella abundance I noted.
Prevotella is responsible for aspiration pneumonia, with the same ground-glass opacity being used to detect Covid19. And also for IL-6 overexpression.
Even if secondary infection they should have reported, 1/4 of 26 million reads.
They do note in red the mysterious bat-nCov in SI table1. Yellow marking is by me.
Here is the SI pdf.