Respiratory syncytial viruses

Respiratory syncytial virus (RSV) is one of the most common causes of respiratory tract infections. It is transmitted through droplets, direct contact with an infected person, or via contaminated objects. The virus is found worldwide and causes annual seasonal outbreaks, primarily during the fall and winter months.

In most healthy adults, the infection presents as a common cold. However, in older adults, people with chronic heart or lung disease, and patients with weakened immune systems, it can lead to severe pneumonia, exacerbation of an underlying condition, hospitalization, or death. RSV is also a major cause of severe illness in young children, particularly infants.

An effective vaccine is available for people at higher risk, which significantly reduces the likelihood of severe illness and hospitalization. A doctor determines whether vaccination is appropriate based on age, health status, and individual risk factors.