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Colorectal cancer The colon is also called the large intestine. The colon is in the lower part of the abdomen. Rectum is the last part of the colon and its main function is to store fecal matter until when it is expelled.   The main function of the colon is water and nutrient absorption. Cells mostly affected The colon and the rectum are lined with mucus secreting cells. Mucus protects the lining of the colon from erosion. These cells are usually mostly affected. Cancer that affects mucus secreting cells is called adenocarcinoma. Polyp growth usually and mostly precede colorectal cancer. Early excision of polyps helps reduce incidences of colorectal cancer. Symptom of Colon Cancer includes : Diarrhea Weakness or fatigue Anemia Narrow stools Irritable bowel syndrome (IBS) Constipation Pain, cramps, or gas in the abdomen Pain during bowel movements Rectal bleeding or blood in the stool Unexplained weight loss Changes in stool consistency...

VACCINES USED IN KENYA AND THEIR SIDE EFFECTS A vaccine is a substance derived from a pathogen or synthetically made and is administered in order to provide immunity against diseases. A vaccine is antigenic substance as opposed to being pathogenic. This confers artificial or active immunity to the individual. Artificial immunity can last from a few months to many years and booster doses can be administered to boost the immunity even further. Vaccination in Kenya usually lasts from 0 weeks in children to 18 months. TYPES OF IMMUNIZING AGENTS Immunizing agents are in three major groups, vaccines immunoglobulins and antisera ·          Live attenuated vaccines ·          DNA vaccines ·          Recombinant factor vaccines ·          Conjugate vaccines     ·       ...