The queen, who is 96 years old, has been placed under the care of doctors after the latter became concerned about her health.
In a recent statement, Buckingham Palace said: "Following further assessment this morning, the Queen's doctors are concerned about Her Majesty's health and have recommended that she remain under medical supervision."
All four of her children, Prince Charles, Princess Anne, Prince Andrew and Prince Edward, are either with her or going to Balmoral Castle in Scotland.
Harry and Meghan, who happened to be in the UK, are traveling to Balmoral.
Concerns about the Queen's health surfaced in October when she canceled a trip to Northern Ireland. Her mobility has prevented her from participating in some events this year and she continues to use a walking stick.
