What can the coronavirus outbreak teach us about bringing Mars samples back to Earth?

What it can teach us is that the first Mars colonists can suffer the same fate as victims of the Spanish flu epidemic of 1918 and 1919. Should they find life, like some an unknown bacteria or virus, it can take out the whole team.
 
What it can teach us is that the first Mars colonists can suffer the same fate as victims of the Spanish flu epidemic of 1918 and 1919. Should they find life, like some an unknown bacteria or virus, it can take out the whole team.
Not sure but I think he means what if we casually just bring back a lot of samples and just open them up in a lab and do not treat them as if they could be a deadly contaminant to human beings.