Long-time “Jeopardy!” host Alex Trebek announced in March that he had been diagnosed with stage 4 pancreatic cancer. Within days, he offered thanks to “the hundreds of thousands of people who have sent emails, texts, tweets, and cards wishing me well regarded my health.” Then last month, Trebek reported that his cancer was in “near remission,” saying that his doctors “hadn’t seen this kind of positive results in their memory.”

Although the odds remain stacked against Trebek (advanced pancreatic cancer has a 3% 5-year survival rate), his experience raises an intriguing question: What are the benefits of such well wishes?

Greeting card industry statistics amply demonstrate the relevance of the question to most Americans: We buy about 6.5 billion greeting cards a year, and while birthdays constitute the number one occasion, “Get Well” cards figure heavily in the mix.

Benefits for recipients

The most immediately apparent benefits of well wishes accrue to recipients. When we are injured, sick or suffering, knowing that someone else is thinking about us can be a source of comfort. It counteracts one of the worst aspects of suffering – isolation. During periods of convalescence, we often miss school or take time off from work and other social activities, which leaves us feeling alone. Knowing that we are in someone else’s thoughts helps to counteract this.

When such well wishes are accompanied by offers of assistance, they can help to solve everyday challenges. Co-workers might offer to assume work responsibilities so that a colleague can take the time needed to get better. Neighbors might offer to feed a convalescent’s pets, to deliver groceries or to help with household chores or self-care. Relatives might offer to stay with loved ones, or even bring them into their own homes to provide care.

Prayer offers perhaps the most dramatic opportunity to study the health benefits of well wishes. In studies of the efficacy of prayers for others, some studies have shown small health benefits, while others have shown no effect.

As a practicing physician who teaches large numbers of medical students and residents, I believe that sharing well wishes benefits us in all sorts of ways that are not reflected in medical outcomes. For example, reaching out to others can reduce anxiety and fear, and connections formed during difficult times may persist for many years, even a lifetime.

Benefits for well wishers

Wishing others well is also good for the person doing the well-wishing. For one thing, we cannot genuinely do so without shifting our attention away from ourselves. Much unhappiness can be traced to an excessive preoccupation with self, which for some can reach the point that we become curved in on ourselves. Thinking of others counteracts this. There is neurological evidence that acts of generosity make us feel less anxious and happier.

People who feel disconnected from others suffer health consequences worse than obesity, smoking and high blood pressure. By contrast, wishing others well helps us to recognize our interdependence, thereby fostering a greater sense of connectedness. We tend to invest more of our own time and energy in others when we stop and contemplate how much our well-being – economic, social, psychological and spiritual – hinges on theirs.

Of course, there is a trap here that needs to be recognized and avoided. We cannot genuinely wish others well if we are doing it for our own sake. Merely to appear to others to have their best interests at heart while really pursuing our own is but a form of deception, only compounding the adverse effects of self-centeredness and isolation. To realize real benefits from caring for others, we must genuinely care for them.

Benefits for all

It is so important to care for others that we should do it, at least in some cases, even when it redounds to our detriment. For example, marriage, parenting and friendship involve sacrifices. Sometimes we set aside our own good entirely to tend to the needs of another. While we may not benefit directly from such sacrifices, we do help to build larger wholes – relationships and communities – of which we are all a part. We make the world a better place.

The need to foster mutual care has perhaps never been greater. When Americans were asked in 1985 to say how many people they were close to, the typical response was three. By 2004, this number had dropped to zero. Over one-quarter of us reported that we have no one we consider a close friend.

I knew a physician who once met a patient with end-stage skin cancer in the emergency department. When it became clear that the patient had no place to go and no one to care for her, the physician, who had once been a nun, brought the patient into her own home, where she, her husband and their two sons cared for the woman around the clock during the last few weeks of her life. When such stories are shared, they can inspire our own resolve to do more to care more for those in need.

The recent outpouring of well wishes for a television game show host – a stranger to most who reached out to him – offers an important insight into what makes families, friendships and communities thrive. Connectedness and its benefits are not something we should take for granted. Whether in the form of a simple text message or greeting card – or better yet, a phone call or a visit – letting someone who is hurting know that we care can make a big difference for all.

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Richard Gunderman does not work for, consult, own shares in or receive funding from any company or organization that would benefit from this article, and has disclosed no relevant affiliations beyond their academic appointment.