Precision medicine is one way to attack cancer and it's proven to be very effective but, remember that like HIV/AIDS, you're going to need combination therapies.

Precision medicine is diving into the DNA with a knowledge that everybody's tumor has a unique genetic profile and you want to be able to identify that specific piece of DNA that has become mutated and that is driving cancer growth.

Precision medicine is one way to attack cancer and it's proven to be very effective but, remember that like HIV/AIDS, you're going to need combination therapies.

The key to HIV/AIDS was to say let's give a patient multiple different therapies at the same time and that makes the virus much less likely to mutate.

When I think of cancer prevention, I think of cancer vaccines, but I think more broadly of all that we can do to prevent cancer. And part of that is coming up with a vaccine that will work like the vaccines we have for hepatitis B or flu or polio.

Cancer vaccines are in the future. And they could be very effective. Checkpoint blockade, which is acting your immune system to recognize those cancer cells and kill them is another very promising approach and there have been some checkpoint blockade drugs out in the market now that will release the brake on T lymphocytes, the T lymphocyte is your major killer of tumor cells.

The four most common cancers that account for about 80 percent of all cancer deaths are lung, breast, colorectal cancer, and prostate cancer.