<s>[INST] my fiance's brother is 3 years old an has threadworms, i am 22 weeks pregnant and i am worried if i catch them then with they harm my baby at all as i know i can not take anythink while i am pregnant also i with be breast feeding and worried if his case dont clear cant they then harm my baby [/INST] Good day and thanks for the question. It cannot harm your unborn baby and please don't feel worried. I wish you a safe delivery. </s>