Impetigo is a very infectious skin condition that occurs in many infants and children typical sometimes include red sores on the face surrounding the child's mouth and nose and on their hands and feet real open and form honey-colored crusts with mild itching and soreness.
Others may come into contact with the owners when touching infected items such as bedding clothing and toys and practical affects children between ages two and five; it’s more likely to occur in warm humid weather crowded areas with lots of other children and through broken skin which allows the pathogen to enter the body, frequent washing of hands, sterilization, wearing gloves and the application of antibiotic ointment can prevent this for the spread of the illness
He/she is talking about genetic disorders. Interesting topic. An oncologist is a cancer specialist so I don't know the specific cancer disorder but I'm sure there is one.
There may be more than one answer here, but concerning speciation, sympatric speciation can't occur because of the geographic isolation (must be living in the same environment for this to occur).