The Queen said she was "deeply touched" by the "selflessness" of medical staff fighting the Ebola outbreak during her annual Christmas Day speech.
The UK is one of a number of nations that has seen its doctors and nurses volunteer to help countries such as Sierra Leone in West Africa combat the epidemic.
The theme of this year's Christmas broadcast was reconciliation and the Queen also spoke about the 888,246 ceramic poppies placed in front of the Tower of London to mark the 100th anniversay of World War One.
The speech is one of the rare occasions when she does not turn to the Government for advice but is able to voice her own views.
The Queen's traditional message was produced this year by the BBC and recorded in Buckingham Palace's state dining room.
Earlier in the day the Queen attended a Christmas Day service at Sandringham Church accompanied by the rest of the Royal Family.
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