False, because one of the people may already have one
A Clinical Psychologist would be most likely to treat people with serious emotional problems. The field of clinical psychology focuses on diagnosing and treating those with emotional, mental and behavioral disorders.
Viruses because children immune system cannot repeal parasites (no one can) or bacteria that is why we wash or hands. Fungi is not something we can repeal either.
A foot and a leg? teeth and gums? a train engine and a box car? q and u?