Absence letter - school (illness) (more extended period) no impact
Absence note to the school (from parent or guardian) making the school aware of your involvement in the absence of your child for a more extended period due to illness. The illness is not expected to have any impact on long term attendence or performance.
Note: the school should be advised of an expected extended absence as soon as you become aware of it, like when your doctor advises he/she should not attend for an extended period. Nevertheless, this letter would still be an appropriate follow up.