Respiratory Syncytial Virus (RSV) is a common virus that primarily affects the respiratory system. It is especially known for causing infections in infants and young children, leading to symptoms like coughing, wheezing, and difficulty breathing. Most children will have contracted RSV by the age of two, and while it often results in mild cold-like symptoms, it can lead to more severe respiratory illnesses in some cases. RSV spreads easily through respiratory droplets when an infected person coughs or sneezes. It can also survive on surfaces, making it possible to contract the virus by touching contaminated objects. Preventive measures include good hand hygiene and avoiding close contact with infected individuals, especially for vulnerable populations like premature infants and those with chronic lung conditions.