Answer:
Focus on your health.
Explanation:
Dear sister, as you know that i am living away from home and you have to take care of yourself along with home chores. I know you are not taking food as well as rest which is very important for your health.
I am going to tell you that how you can improve your health even in my absence when i am not there to take care of you.
Please follow these steps which will boost your immune system.
Always remember leading a healthier life doesn't have to mean making big changes.