Princess Bajrakitiyabha Mahidol, the eldest child of King Maha Vajiralongkorn,died at age 47 in Bangkok’s King Chulalongkorn Memorial Hospital, ending a three‑year coma that began after a severe illness in 2022. Prime Minister Anutin Charnvirakul declared a period of national mourning, praising her lifelong work on kindness, justice and gender‑focused prison reform.

Three‑Year Coma After a Mycoplasma Infection in December 2022

The royal household confirmed that the princess fell unconscious while training dogs for an army exhibition in December 2022, later attributing the collapse to a mycoplasma infection that can trigger pneumonia.. According to the Bureau of the Royal Household, she remained under continuous medical care at King Chulalongkorn Memorial Hospital until her death on Friday night.

Kamlangjai Project and the UN "Bangkok Rules" Legacy

Princess Bajrakitiyabha’s Kamlangjai initiative, launched in 2017, aimed to rehabilitate female prisoners and prepare them for reintegration. Her advocacy helped secure the United Nations General Assembly’s adoption of the "Bangkok Rules," the first global standards for the treatment of women in detention. as the UN Office on Drugs and Crime named her a goodwill ambassador in 2017, she became a visible international voice for gender‑sensitive justice reform.

Royal Succession Speculation and Her Potential Regency Role

Born on December 7, 1978, the princess was the firstborn of King Vajiralongkorn and Princess Soamsawali, positioning her as a possible regent for her half‑brother Prince Dipangkorn Rasmijoti, the current heir apparent. While she never formally entered the line of succession, analysts noted that her legal expertise and diplomatic experience—spanning a stint at the Thai Mission to the UN and an ambassadorship to Austria (2012‑2014)—made her a unique candidate for a stabilizing constitutional role.

Academic Credentials and International Recognition

Princess Bajrakitiyabha earned a law degree from Thammasat University, then pursued a master’s (2002) and doctorate (2005) in law at Cornell University, focusing on the rights of the accused. Cornell later established a scholarship and a legal scholar exchange program in her honor, underscoring her impact on both Thai and global legal education.

Who Remains Unclear: The Cause of the Underlying Illness

While the royal household cited a mycoplasma infection, the precise chain of events that led to the princess’s prolonged coma has not been independently verified. No medical autopsy results have been released, and the Thai government has not provided further clinical details, leaving room for speculation about whether other health complications contributed to her decline.

According to the royal announcement, the princess is survived by King Vajiralongkorn, Queen Suthida, and several half‑siblings from the king’s multiple marriages. A small gathering of mourners held photographs of the princess at the hospital atrium, reflecting the personal grief felt across Thai society.