Former president George H W Bush in intensive care

George Bush Sr has been moved into intensive care after suffering "a series of setbacks that include a persistent fever," according to a family spokesman.

Doctors are "cautiously optimistic" about the 88-year-old former president's health, he added.

Video report by Debi Edward.

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George Bush Sr in hospital

The former US president George Bush Sr has been released from intensive care after being admitted to a hospital in Houston, Texas with bronchitis last month.