Dr. John Lewis David M.D.

Recommended Articles

• Why Is the Average Cystic Fibrosis Lifespan Longer in Canada than in the United States?

  The developed world has seen a strong increase in both the lifespan and quality of life for individuals diagnosed with cystic fibrosis. In both the United States and Canada, better treatment options and earlier diagnosis have made living with the chronic illness much more manageable.Interestingly,...

• What Is Seasonal Affective Disorder?

  Seasonal Affective Disorder or SAD is a type of depression that comes and goes with the seasons. It starts during winter, usually stemming from a low amount of natural sunlight and is often lifted in the months of summer or spring. The symptoms often can begin in autumn as the days start getting...

• Cancer Answers: Is There a Screening Test for Ovarian Cancer?

  Symptoms of ovarian cancer do not present themselves within early stages and in most cases, ovarian cancer is not detected during routine pelvic examinations.For this reason, most women with ovarian cancer are diagnosed at an advanced stage – stage III or stage IV – at which case the cancer...

• Questions You Should Be Asking Your Doctor

  IntroductionAlthough doctors have the best intentions, it does not always mean that they will perfectly recognize their patient’s greatest need. For this reason, patients also need to take an active role when it comes to communicating with their doctor.One of the best ways to make sure that...

• What Is Pyrexia: Causes, Symptoms, and Treatment

  Introduction Pyrexia is the medical term for fever, in which the human body temperature rises above the average normal (37 degrees Celsius or 98.6 degrees Fahrenheit). Pyrexia is one of the most common symptoms of numerous medical conditions.There are multiple factors can affect the normal body...

• Anemia Symptoms

  What is anemia?Anemia occurs when there are low levels of red blood cells (RBCs) in the body. Red blood cells are the ones that carry oxygen all over the body. So when a person's RBC count is lower than normal, it means that there is not enough oxygen in the blood, causing symptoms of anemia, such...