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A cancer vaccine that teaches the body to fight tumours has put three lymphoma patients into remission.
The vaccine is injected directly into the tumour and teaches the immune system to destroy it, as well as seek other cancerous cells.
Researchers tested it on 11 patients with lymphoma and said some were in full remission for months and even years.
Trials have been so successful that experts believe it offers hope for many other cancers, including those of the breast, head and neck.