Queen Elizabeth is recovering from a stomach ailment.
The 86-year-old British monarch, who was hospitalized over an apparent stomach infection that ailed her for days, is in "good spirits" besides the symptoms of gastroenteritis, according to the Associated Press.
A spokesperson for the queen explained why her hospitalization was necessary.
"This is a precautionary measure," the royal spokesperson explained to AP. "She was not taken into hospital immediately after feeling the symptoms. This is simply to enable doctors to better assess her."
The illness was first announced on Friday, March 1, leading to Elizabeth canceling a visit to Swansea, Wales, to present leeks to soldiers of the Royal Welsh Regiment. She instead spent the day trying to recover at Windsor Castle, but appears to have had trouble kicking the bug, according to AP.
The symptoms of gastroenteritis, which are commonly vomiting, nausea and diarrhea, usually pass after one or two days, although they can be more severe in older or otherwise vulnerable people. WebMD characterizes the illness as what many people often dub the "stomach flu," and dehydration is a common complication.
Due to her ailments, the queen was forced to cancel a visit to Rome and other engagements she had planned for the upcoming week.
The queen, who rarely cancels her royal appearances, has undertaken a number of engagements over the past week. On Tuesday, she met the new archbishop of Canterbury, Justin Welby, at Buckingham Palace, and on Thursday she presented a host of Olympic stars, including track and field star Jessica Ennis, with honors during an investiture ceremony.