She sets her own standards, from her striking sculptured hair to the bright lashings of eye shadow caked on a face that she has admitted in the past owes a lot to modern surgery.

CNN: Dolly Parton: 'I know I'm a bit over-exaggerated'

Truth is, for all the life-saving miracles unfolding each day at modern hospitals--from cancer chemotherapy to heart bypass surgery--they are also filled with danger.

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More broadly, the principle upon which immunisation is based - namely, exposure to a non-harmful version of the naturally occurring infection in order to induce a natural and protective immune response - can be seen to be a far more natural process than the drug- and surgery-based therapies most widely venerated as the main achievements of modern medicine.

BBC: 'The natural benefits of vaccines'

In modern times, there have been cases of vision restored thanks to corneal transplants and cataract surgery.

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