I guess we are all pretty de-sensitised to the term 'underlying health conditions' and its association with increased chances of succumbing to Covid-19 by now. But what do we actually know about these underlying health conditions? What are they? And why do they put us more at risk? According to Dr Henderson in patient.info/news-and-features/covid-19-corona..."Underlying chronic health conditions such as heart disease, diabetes and lung disease can affect the immune system. Th