The mild symptoms of RSV can be dry cough, low-grade fever, sore throat, sneezing, headache, stuffy nose, and runny nose. However, if a case of RSV infection spreads to the lower respiratory tract, this can cause pneumonia or bronchiolitis, and this can lead to symptoms like severe cough, fever, wheezing, rapid breathing, trouble breathing, and a bluish color to the skin. If an infant has RSV, the symptoms and signs can be short and rapid breathing, irritability, unusual tiredness, poor feeding, cough, and breathing difficulty. Such symptoms can be severe in infants and some adults.