'Timebomb' vaccine fights cancer

A delayed-release system could help produce more effective vaccines against a number of diseases, including cancer.

Scientists from Massachusetts Institute of Technology encased their "DNA vaccines" in biodegradeable spheres.

They do not break down and release the vaccine until they are carried to key locations such as the lymph nodes.

The researchers, writing in the journal Nature Materials, say it should mean a far more powerful vaccine - which might be able to target tumours.

DNA vaccines, which instead of a whole virus contain fragments of genetic material from a virus or bacteria.

Doctors see them as a modern alternative to traditional vaccines, possibly working against a wide variety of illnesses with fewer side-effects.

It is possible that they could deliver a life-long immunity to certain infections which have a vaccine, but only one which gives a few year's protection.

Source : BBC News | More Information