Write an application to the Principal for sick leave

Sir,

With due respect I would like to inform you that I have been suffering from fever for the last two days the temperature running high I am not in a condition to attend school. I had been advised to take rest for one week.

I, therefore, request you to kindly grant me leave for one week, i.e. from August 5th to 12th. I will produce my medical certificate the day when I rejoin the school.

Thanking you,

Yours faithfully,