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).
ï A grandparent. ï A sister or brother, a stepsister or stepbrother, or other proper person. At this time in New York, other non-parents, like stepparents, aunts, uncles, cousins, and former gay and lesbian partners usually cannot get visitation. But this area of the law is changing. Someday such people may be able to get visitation.