He was applauding healthcare workers for their service.

A day after Prince Charles announced that he was diagnosed with COVID-19, he appeared to be in good spirits on the Clarence House Instagram Story as he participated in the Clap for Carers initiative, a way for citizens to thank the National Health Service for its hard work during the coronavirus pandemic.

The video showed Charles and his wife, Camilla, participating, albeit separately, by clapping. The Daily Mail's Rebecca English captured the moment and posted it to her Twitter account. The two are self-isolating at their Scottish home, Birkhall.

Hello! notes that Charles was "back at his desk working" after his diagnosis and setting a good example for everyone by "conducting meetings by phone and video conferencing."

In addition to Charles and Camilla, Prince William and Kate Middleton, the Duke and Duchess of Cambridge released a video of their kids, Prince George, Princess Charlotte, and Prince Louis, clapping to applaud the NHS, too.

In the wake of Prince Charles's diagnosis, members of the royal family have taken precautions by isolating themselves. The queen, who saw Charles on March 12, and also shared a video of her staff clapping to support the NHS, is at Windsor Castle with Prince Philip.

"Her Majesty The Queen remains in good health," reads a statement from the palace. "The Queen last saw The Prince of Wales briefly after the investiture on the morning of 12 March and is following all the appropriate advice with regard to her welfare."