<s>[INST] age 48weight 85 kgs height 5.5 family medical history - four of my own sisters having cancer two sisters has breast cancer and one sister has  throat, lungs, one sister had brain and multiple place cancer and one of my causin sister is also having breast cancer [/INST] Hi, dairy have gone through your question. I can understand your concern. Cancer is not contagious disease.  However, it runs in family because of hereditary factors.  So if your other sisters had cancer then you have high chance of cancer because of genetic cause.  Hope I have answered your question, if you have doubt then I will be happy to answer. Thanks for using Chat Doctor. Wish you a very good health. </s>