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).
What relationship to you is your great uncle's grandson? Your great uncle is the brother of your grandmother or grandfather. Therefore you and your great uncle's grandson share one or two great grandparents, and you are both the samâ¦e number of generations separated from that shared ancestor.