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 nephew is a son of one's sibling or half-sibling, and a niece is a daughter of one's sibling or half-sibling. Sons and daughters of siblings-in-law are also referred to as nephews and nieces respectively, even though there is no blood relation.The word nephew is derived from the French word neveu.1  Nephew â son of one's brother/sister (and his/her spouse). 2  Niece â daughter of one's sister/brother (and her/his spouse).ons and daughters of siblings-in-law are also referred to as nephews and nieces respectively, even though there is no blood relation. The word nephew is derived from the French word neveu. 1  Nephew â son of one's brother/sister (and his/her spouse). 2  Niece â daughter of one's sister/brother (and her/his spouse).