Final answer:
The health-care provider is concerned about Jeni's signs and symptoms because infections during pregnancy can lead to serious illness or even death in newborns.
Step-by-step explanation:
The health-care provider is concerned about Jeni's signs and symptoms because infections during pregnancy can lead to serious illness or even death in newborns. Pregnant women are at a higher risk of complications from infections due to changes in their immune system and the potential impact on the developing fetus. It is important for the health-care provider to assess the cause of the fever and other symptoms in order to provide appropriate treatment and ensure the well-being of both Jeni and her baby.