[levosmetalo]

I’m more concerned what happens when we bring some microbes from Mars.

[daveguy]

Andromeda Strain makes a good story, but viruses and bacteria tend to evolve with their hosts and environment. It is unlikely that any virus or bacteria brought from mars would have a serious impact on humans or our environment. We probably aren't good hosts to something that's been evolving in martian conditions.

[agumonkey]

Interesting, maybe they plan to never bring anything to Earth's surface .. maybe use ISS as an 'air gap'

[paulpauper]

things that go to mars tend to stay there

[ceejayoz]

That's changing very soon.

Perseverance's mission includes collecting and storing samples for a return mission. https://en.wikipedia.org/wiki/Mars_sample-return_mission

[astroflask]

And also things that have gone to Mars in the past have blasted off chunks of Mars into Earth.