The oldest and longest-reigning monarch in the world was hospitalized overnight on Wednesday but was able to return to Windsor Castle the next day. Officials stated that she was in good spirits and back to work. The Queen had been advised by her medical staff to rest, but her illness was not related to COVID-19. The Palace announced that she attended hospital for preliminary investigations and returned to Windsor Castle in good spirits. There were no details given on the reason for her medical attention, leading some to question if the official account was complete. Prime Minister Boris Johnson sent his best wishes and confirmed that the Queen was back to work. Johnson informed reporters that Her Majesty, the Queen, has returned to work at her desk in Windsor. A source close to the royal family stated that the queen had been at the King Edward VII hospital in London for practical reasons and her medical team had been cautious. The source mentioned that she is now resting and carrying out light official duties. Elizabeth, who is queen of multiple realms, including Australia and Canada, resumed work on Thursday afternoon. Despite significant changes in British society over the years, she has been a symbol of stability and has maintained the popularity of the monarchy. She has earned widespread respect in Britain and abroad for her quiet and dedicated commitment to duty, even in old age, even from those who wish for the monarchy to be abolished. Elizabeth recently hosted a drinks reception at Windsor for billionaire business leaders, including Bill Gates, after Prime Minister Boris Johnson organized a green investment conference. The queen, along with her son Prince Charles and grandson Prince William, greeted guests like US climate envoy John Kerry without masks. She was seen smiling and chatting with guests, showcasing her robust health as she approaches her 70th year on the throne. The last known time she spent a night in the hospital was in 2013 due to symptoms of gastroenteritis. In 2018, she had a successful surgery for an eye cataract, and in 2003, she had a knee operation. However, royal officials are reluctant to discuss her health issues. Her husband, Prince Philip, passed away in April at the age of 99. Despite this, she has continued to fulfill her official duties, although she has delegated more tasks to Charles and other members of the royal family due to her age. Recently, she was seen using a walking stick in public for the first time, aside from after her knee operation. She not only has experienced the loss of her husband, who she referred to as her source of support and stability, but also her second son Prince Andrew has stepped down from his royal responsibilities due to his connections to Jeffrey Epstein, a convicted sex offender who died in a New York jail in 2019. Additionally, her grandson Prince Harry and his wife Meghan have also decided to leave their royal duties and relocate to Los Angeles, where they have criticized Buckingham Palace. Elizabeth's upcoming significant event is at the end of the month when she will host world leaders at the start of COP26 in Glasgow.