A vaccine against lung cancer, developed in Cuba, is being trialled in the USA after impressive claims of its effectiveness in treating late-stage lung cancer.
Rather than targetting the cancer cells themselves, CIMAvax works by cutting off the supply of the growth factor which causes the cancer cells to grow.
Cancer Research UK is already conducting clinical trials of CIMAvax in the UK in conjunction with chemotherapy – read more.
Read more about the US clinical trial at the Roswell Park Comprehensive Cancer Center in Buffalo, New York State.
Read the story and see the video on the BBC World Service website.