The announcement comes two days after Navalny’s physician said his health was deteriorating rapidly.
“Alexei is dying... it's a question of days,” said a representative.
Health care workers in Rio de Janeiro say they have had to resort to tying conscious patients to beds during the procedures.
The Duchess of Sussex was unable to attend the ceremony, as she is pregnant with the couple's second child and was advised not to travel.
The Duke of Edinburgh was laid to rest in the Royal Vault at St. George's Chapel at Windsor Castle.
The queen was married to her "strength and stay," the Duke of Edinburgh, for 73 years.
The slimmed-down royal funeral, which was not a state funeral per the prince’s wishes, started with a unique, personal touch.
The park art in Bristol, England, is all heart.
It comes amid repeated setbacks in the worldwide vaccination campaign and a deepening crisis in places such as Brazil, India and France.
The Duke of Edinburgh's funeral will salute both his service in the Royal Navy and his support for Queen Elizabeth over three-quarters of a century.