Adverse long-term chemotherapy of cancer include a weak immune system, weight loss, hair loss and increased risk of developing other cancers. Find out how many side effects of chemotherapy to disappear over time with the idea of adoctor in this free video on chemotherapy and cancer treatment. Expert: Dr. David Cathcart Bio: Dr. David Cathcart medical occupational health to Heartland Regional Medical Center in St. Joseph, Missouri, to more than 20 years. Director: Johnny Cathcart