Can we ever eliminate cancer? Joe Biden is the latest famous figure facing the disease. But experts say there is hope for the future.
The world wishes an ex-president well
Difficult year: Biden was forced to drop out of the 2024 US presidential election after questions over his health, age and ability to work. Glossary
Joe Biden - An American politician who was the 46th president of the United States from 2021 to 2025.
White House - The official residence of the US president, in Washington DC. Burnt by British troops in 1814, it was rebuilt and painted white to hide the smoke stains.
President - In some countries, the leader is called the president.
Prostate - A small gland that is part of the male reproductive system.
Eliminate - Completely put an end to.
Extreme - Very great, or beyond what is expected.
Obesity - The medical condition of being very overweight. There are many ways of measuring this, including a BMI of 30 or more. (You can work out your BMI by dividing your weight in kilograms by your height in metres squared.)
AI - A computer programme that has been designed to think.
CT scan - A computed tomography scan — a medical imaging technique usually used to make images of inside the body.
Vaccine - A biological preparation that improves immunity to a particular disease. A vaccine typically contains an agent that resembles a disease-causing microorganism, but in its weakest form.
Immune system - The network of cells, organs and proteins that defend the body from infection.
Expensive - Costs a lot of money.