The ASX healthcare sector covers everything from biotech and pharmaceutical companies to owners and operators of hospitals and other medical facilities to designers and manufacturers of medical devices. Our awareness of the healthcare sector has been acutely raised due to the demands upon it by the COVID-19 pandemic. ASX healthcare shares include a diverse range of companies, some of which are among the largest listed on the exchange by market capitalisation. For example, leading biotechnology company CSL Limited (ASX: CSL) is the third largest company on the ASX, with a market cap of more than $140 billion.