Your Body Mass Index (BMI) is
18.41
Your BMI indicates that you are
Under Weight for your height.
Lack of calories, vitamins and minerals weakens your immune system, making you susceptible to infections and prone to Osteoporosis.
You can gain weight by including energy dense food, which are rich in calories and less in volume, like olives, raisins, nuts etc.
Focus on muscle toning and resistance training exercises