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Wendy Martin, who is 68 and from Oxford, is "profoundly deaf" and uses a hearing aid.

Sade Oram, 25, and her younger sister Topaz, 23, were diagnosed profoundly deaf as toddlers and fitted with cochlear implants.

Lucy, 22, was diagnosed as being profoundly deaf at nine months.

Eli Lilly announced this week, for example, that a profoundly deaf boy from Morocco given its treatment as part of a clinical trial in Philadelphia can now hear.

The teenager is profoundly deaf and was born without a cochlea, meaning he cannot use hearing aids or cochlear implants and does not use speech.