The epithelium is the first contact for food, bacteria and other things ingested. The epithelium can be renewed by quickly dividing stem cells normally, which can bring about new growths called polyps also. These remain benign usually, but some may acquire so many genetic abnormalities that they ultimately type a cancerous tumour. There is evidence that some food parts including fibre, folate, polyunsaturated essential fatty acids, plant chemicals such as glucosinolates or flavonoids and gut fermentation products such as butyrate can offer protection at various levels of cancer formation.Parents are often unaware that children are in risk for so many significant and life-threatening diseases. The low levels of vaccine-preventable illnesses at the nationwide level shows immunizations are designed to keep children healthy by managing the spread of infectious illnesses. Parents should talk to their doctor to ensure infants are up-to-date on the immunizations. National Infant Immunization Week emphasizes the need to fully immunize children against 14 vaccine-preventable illnesses and celebrates the achievements of immunization programs to advertise healthy communities.