Most humans, at least in countries where health resources and decent nutrition are readily available, live into their sixties without developing life-altering illnesses. By our seventies, however, disease and injuries occur with increasing frequency.
Once such events develop, their treatment and/or complications often lead to other health problems, an increasing burden on our aging bodies. This clinical spiral may have a steep or gradual slope but the general course is likely to continue. Modern drugs, many of which act by modifying our immune system, can produce remarkable benefits but their potential side effects may end up hastening our demise.
Indeed, how and if to treat certain conditions will often come down to a well-informed choice. The quality of our life becomes an important consideration and the need to address end-of-life matters, including issues such as resuscitation, cannot and should not be ignored. Clarifying our wishes in advance is a gift to those we leave behind.