Fever can support the immune system's attempt to gain advantage over infectious agents, such as viruses and bacteria, and it makes the body less favorable as a host for replicating viruses and bacteria, which are temperature sensitive. Infectious agents are not the only causes of fever, however.
Your sister's grandson is your great nephew. You are his great aunt (if you are a woman) or his great uncle (if you are a man).
A half sibling is a brother or sister who has one parent in common with you (eg: you both have the same mother, but different fathers). A step-sibling is a sibling who is rel â¦ ated to you only by marriage of parents.