Afspraak afzeggen wegens ziekte mail

Here's an example email to cancel an appointment due to illness:

Subject: Cancellation of [Appointment Date] due to illness

Dear [Name of the person you're cancelling on],

I regret to inform you that I will be unable to keep our appointment scheduled for [Appointment Date] at [Time]. Unfortunately, I have fallen ill and am not feeling well enough to attend.

I apologize for any inconvenience this may cause and would like to reschedule for a later date.

Thank you for your understanding and I look forward to hearing back from you soon.

Best regards, [Your Name]