King Charles III on Friday waved to well-wishers after spending a "short period of observation in hospital" due to side effects from his cancer treatment, which forced him to cancel appointments. Here's what we know about the 76-year-old British head of state's latest health scare.

King Charles III took a trip to the hospital on Thursday because of side effects from his ongoing cancer treatment.

In his message posted on social media Charles spoke of his and the Queen's shock and sadness after a powerful 7.7 magnitude earthquake struck Myanmar at midday local time on Friday, claiming more than 1,000 lives and injuring 2,376 people, according to the country's military-led government.