They found that most babies infected with the hhv-6 virus , which causes roseola , had the virus integrated into their chromosomes .
他们发现很多感染hhv-6病毒的婴儿患有红疹，并且病毒整合进了他们的染色体中。
Febrile seizures are often triggered by a fever from a common childhood illness such as roseola , a viral infection that causes a high fever , swollen glands and a rash .
