Microorganisms that includes viruses and bacteria are really interesting forms of life, and even its disease causing counterparts are keeping life interesting. You think what I am talking about. This ties in with the air thing too. Films viruses, viruses and bacteria come in all shapes and colours like people each unique. But unlike a human that look like another I find germs are unique and little yet annoying pieces of art.
As the creator made life , he/she intended on into be glorious and interesting as this what life is about, seeing the different and unique. And the most unique are the smallest.