Immunotherapy is an experimental-stage therapy which triggers body’s own immune system to fight cancer. Two approaches are being pursued by researchers. The key player in both approaches is immune system's T-cells.
One approach has been to draw blood from the patient and genetically tweak the T-cells present in the blood. These are then infused back into the same person's bloodstream to recognize and kill cancer cells. This approach has been shown to work in some people with cancer of the lung, cervix, blood cells (leukaemia), skin (melanoma) and bladder.
Another approach has been to use drugs called 'immune checkpoint inhibitor'. T-cells make certain proteins which keep immune responses in check and these proteins prevent T-cells from killing cancer cells. 'Immune checkpoint inhibitor' drugs block these proteins, thereby enabling T-cells to kill cancer cells better. This approach has been shown to work in some people with breast, bowel and ovary cancers.
Clinics offering variations of immunotherapy in India are listed in Resources below. However, it must be noted that these clinics have no authorization from medical field's statutory and regulatory bodies.