“Illness is the night-side of life, a more onerous citizenship. Everyone who is born holds dual citizenship, in the kingdom of the well and in the kingdom of the sick. Although we all prefer to use only the good passports, sooner or later each of us is obliged, at least for a spell, to identify ourselves as citizens of that other place.”

- Susan Sontag.

This quotation begins Dr. Siddhartha Mukherjee’s Pulitzer Prize winning biography of cancer, ‘The Emperor of All Maladies.”

In this series we pay tribute to five physicians who preside over ‘the kingdom of the sick’ with not only their healing hands but their powerful words: Drs. Siddhartha Mukherjee, Atul Gawande, Abraham Verghese, Sanjay Gupta and Sandeep Jauhar.

The case of the invisible patient, the I-patient who exists just on the physician’s computer monitor as so much data, while the real live patient in the bed is ignored, has become an important issue for Verghese, both in work and his writing.

“I think that there’s a very special transaction that takes place between physician and the patient during the course of a careful examination,” he says. “It’s during that exam when the physician touches you and pulls your eyelid down and looks into your eyes and thumps on your chest – that’s when a very ritualistic bond is formed and if you shortchange that by just sitting behind your desk and saying ‘Let’s send you for this test, let’s send you for that test,’ you have essentially shortchanged yourself from an important transaction.”

“There is now a real feeling of home, I must say, in all three places. I don’t think I could do without one of them,” says Mira Nair.

In recent days Dr. Abraham Verghese has been boarding jets at breakneck speed, shuttling between countless cities and towns in North America, not for medical conferences or research but for that quintessential ritual of an author’s life – the book tour…