On Tue, 26 Jun 2018, Jeff Findley wrote:
What are we going to do about preventing Earth bacteria
from contamenating Mars biota when we set foot on Mars?

You're assuming that there is an actual living Mars biota. This has
not been proven. There are signs that Mars may have had life in the
distant past, but we do not have any definitive evidence that proves
life exists on Mars today.

Isn't my assumption. It's NASA's.