Viruses and bacteria tend to be super specialized for their hosts temperature, humidity, and cellular ranges and die soon after being abandoned into the cold uncaring world. Except for when they're in bio-films. Then, recent research suggests, they can live for much longer.

Fungal spores, however, can live forever even in deep space.

Valley fever, caused by Coccidioides immitis is a danger to Archeologists (and ATV enthusiasts) as it lives in the soil and if its spores are breathed in it can cause some symptoms.

So, there's some danger, but not much. And the people doing this work will likely know the details.