My sister had fever before 2 weeks, she take tablets, and then she is fine. Then after three days she had a urine infection, take blood test and also urine test, the test result shows malaria is negative. Now she has fever. Take blood test, malaria is negative. Can she be affected by malaria or just urine infection?
Since your sister had two blood tests for malaria and they were both negative, it seems likely that her fever is from the urine infection. However, if she continues to have fever (after treatment for the urine infection), she needs to return to the clinic for further investigation to find the source of the problem.