Subject for out of office sick email

Here are some examples of subjects for an out-of-office sick email:

1. Out of Office - Unwell
2. Sick Leave - Unable to Work
3. Out of Office - Illness
4. Unavailable Due to Illness
5. Out of Office - Taking a Sick Day
6. Unable to Work - Out of Office
7. Out of Office - Medical Appointment
8. Sick and Unable to Respond
9. Out of Office - Illness and Recovery
10. Unavailable - Out of Office Due to Health Reasons

Remember to keep the subject line concise and clear, so that the recipient knows that you are unavailable due to illness.