PD1 cannot cure cancer because it does not directly kill cancer cells. Its main purpose is to activate the human immune system, thereby achieving an anti-cancer effect. It can improve the survival rate of cancer patients. However, during treatment, due to individual differences, some patients achieve good results while others do not.

1. Cancer is incurable.

Although PD1 antibody drugs can block the rapid development of cancer cells, thus maintaining the efficient attack of immune cells on cancer cells, the reason why cancer cells can develop so rapidly in the patient's body is mainly because they can avoid the attack of lymphatic immune cells and develop rapidly. PD1 can only inhibit the development of cancer cells but cannot cure them.

2. "PD-1 Inhibitors" are a new class of anti-cancer therapies that are currently highly regarded. They belong to immunotherapy in cancer treatment and mainly aim to improve the human body's immunity against cancer by blocking the immune suppression system.

3. PD1 drugs do not directly target tumors, but work on the immune system to indirectly achieve anti-tumor purposes. PD1 drugs are not specifically targeted at a certain type of tumor. It has been discovered that PD1 has an effect on various tumors, and the FDA-approved indications have exceeded ten.