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Platinum Jubilee and beyond

Elizabeth's Platinum Jubilee celebrations began on 6 February 2022, marking 70 years since her accession. In her accession day message, she renewed her commitment to a lifetime of public service, which she had originally made in 1947.

Later that month, Elizabeth fell ill with COVID-19 along with several family members, but she only exhibited "mild cold-like symptoms" and recovered by the end of the month. She was present at the service of thanksgiving for her husband at Westminster Abbey on 29 March, but was unable to attend both the annual Commonwealth Day service that month and the Royal Maundy service in April, because of "episodic mobility problems". In May, she missed the State Opening of Parliament for the first time in 59 years. (She did not attend the state openings in 1959 and 1963 as she was pregnant with Prince Andrew and Prince Edward, respectively.)

The Queen was largely confined to balcony appearances during the public jubilee celebrations, and she missed the National Service of Thanksgiving on 3 June. On 13 June, she became the second-longest reigning monarch in history (among those whose exact dates of reign are known), with 70 years and 127 days on the throne—surpassing King Bhumibol Adulyadej of Thailand. On 6 September, she appointed her 15th British prime minister, Liz Truss, at Balmoral Castle in Scotland. This was the only occasion on which Elizabeth received a new prime minister at a location other than Buckingham Palace. No other British monarch appointed as many prime ministers. The Queen's last public message was issued on 7 September, in which she expressed her sympathy for those affected by the Saskatchewan stabbings.

Elizabeth did not plan to abdicate, though she took on fewer public engagements in her later years and Prince Charles performed more of her duties. She told Canadian governor-general Adrienne Clarkson in a meeting in 2002 that she would never abdicate, saying, "It is not our tradition. Although, I suppose if I became completely gaga, one would have to do something." In June 2022, Elizabeth met the Archbishop of Canterbury, Justin Welby, who "came away thinking there is someone who has no fear of death, has hope in the future, knows the rock on which she stands and that gives her strength."