Every human beeing carries 10 times more specimen of bacteriae, fungi and microorganisms on and in him than is the count of his or her body cells. Each of us is in fact a symbiotic system of a vast number of life forms, and we simply can´t live without them. We are designed to live with them: they help us digesting things, they keep us at good health, they defend us against other microorganisms which may try to feed on us, and they simply keep us alive. Without the aid of this force, each of us might die within a few days.

This is a fact of which many people are not aware of. Instead, they anxiously try to disinfect everything they might get in touch with. This behavior is as almost stupid as killing every pipeded organism passing along because killers are bipeded organisms. Some bipeded organisms really are killers, but much more bipeded organisms are police officers, teachers, loving parents, children, students, grandparents, nurses, medics, or flamingos. Therefore, one should take an utmost care to make a difference.

Disinfecting an astronaut and his spacecraft might mean killing him. At least a permanent itching on the skin, dysentery and sickness would be the result of such a treatment. The professional and personal performance of a person with these symptoms would be improper to any type of work in space.

Every person spills 10 million dust particles per minute. This produces the dust we find in our homes, 10 grams per person per day. This applies for every astronaut, too. This dust must be filtered in the life-suporting systems of the craft, and it must be removed in time, to avoid these systems from getting blocked up.

It is essential to build a space station such that it is easy to clean and maintain, and such that its design cannot create locations where hidden condensations of water build up in which dust particles get trapped in, offering microorganisms, fungi and bacteriae a habitat to flourish.
It would be impossible and unfeasible to disinfect an astronaut and his equipment such that such microorganisms, fungi and bacteriae can´t make their way into the station.

Some 95,5% of all life forms on and in earth, and the air, are bacteriae and fungi. The rest of the life forms are all the plants and algae, all the animals, and us.

Regards,

Günther