Dealing with notions of health, illness and disease contains dealing with fuzziness. As the paper will demonstrate, states of these notions do not only exist or not exist. The medical philosopher and physician SadeghZadeh introduced the notions of fuzzy health, fuzzy illness and fuzzy disease. A closer look will be taken on the concept of fuzzy disease. Because there are different possibilities to interpret the concept of disease, amongst others by linguistic and social backgrounds, Sadegh Zadeh indroduced potential candidates: complex „human conditions“. Afterwards, fuzzifications of life sciences will be extended and the fuzzification of the genome, including two approaches that deal with this theme, will be discussed.