Vaccines changed the pandemic’s course. A look at other life-changing vaccines and why hesitancy undoes progress.
A look at why some people report pleasant smells as rancid and how mint and garlic could help retrain noses.
What you need to know about the possible links between contracting COVID-19 and developing diabetes.
Dr Khan looks at the new outbreak of an old virus that has been detected in about a dozen countries in two weeks.