What symptoms may arise from a serious case of RSV?

Respiratory Syncytial Virus (RSV) is a common viral infection that primarily affects the respiratory system, especially in young children and those with weakened immune systems. In a serious case of RSV, the most notable symptoms include high fever, cyanosis (a bluish coloration of the skin indicating lack of oxygen), and difficulty breathing. These symptoms reflect the severe inflammation and obstruction of the airways caused by the virus, leading to inadequate oxygen exchange and respiratory distress.

High fever often accompanies serious viral infections, as the body responds to infection by raising its temperature to fight off the virus. Cyanosis signals that the body is not receiving enough oxygen, which can occur when the respiratory passages become blocked or compromised. Difficulty breathing is a direct result of the airways being narrowed or filled with mucus, which can happen in RSV cases where bronchiolitis or pneumonia may develop.

Understanding the severity of these symptoms is crucial, as they indicate the need for immediate medical intervention. In contrast, symptoms associated with milder or less severe cases, such as those listed in the other options, do not indicate the same level of respiratory compromise or potential risk to the patient.