Prince Charles is not going to let a potentially deadly disease affect his work and causes. The Prince of Wales is still actively making his presence felt even as he is in self-isolation after testing positive for COVID-19.

On Saturday, March 28, the heir to the throne shared a series of throwback photos to remind the public to observe the annual environmental event, Earth Hour. The Prince of Wales, who is a staunch environmentalist, urged his followers to be aware of their carbon footprint to lessen their impact in the environment.

Prince Charles shared images of some of his conservation work in the last 30 years as the president of the World Wildlife Fund in the U.K. The royal said that his father, Prince Philip, was also a conservationist as the very first president of the organization in 1961 until 1982.

The Prince of Wales also provided a link to Earth Hour, which was observed around the world over the weekend. It implores millions of people to turn off their lights for an hour as a symbolic gesture to signify their commitment to prevent Earth's further destruction.

Meanwhile, doctors say that Prince Charles has mild symptoms of COVID-19. They believe he was contagious beginning March 13 or just 24 hours after he last saw his mother, Queen Elizabeth, in person.

Sources said that Prince Charles' team and those whom he was in contact with from March 13 onwards were told to go into self-isolation as well and observe their health, per Daily Mail. It's unclear, however, where the Prince of Wales might have gotten the infection since he was doing a lot of work during the first and second week of March.

As a busy working royal, aides of Prince Charles said that he's keeping on with business as usual. He is keeping his work schedule albeit by phone or through digital conferencing since he is not allowed to be meeting people face-to-face.

Chief of Prince Charles' focus during this time is the Prince Trusts, his foundation, his Duchy of Cornwall and his Sustainable Markets Council. He is reportedly working closely with his people inside his digital work-from-home space.

Earlier, Prince Charles was also seen for the first time his coronavirus diagnosis. He participated in the Clap for Carers campaign to thank the medical frontliners saving lives and making COVID-19 victims better.

Clarence House posted a video of the Prince of Wales from his private residence in his Scottish estate. Dressed in a suit and tie, Prince Charles applauded the doctors, nurses and medical staff as despite battling with a coronavirus infection.

He also thanked the public for their wishes for him to get well soon. The Prince of Wales said that he was "enormously touched" by the kind words he received.