Tell me why RSV is highly contagious

In this week's Tell Me Why episode, Dr. Feroza Dawood, Obstetrician and Gynecologist, explains to podcast host Maria Botros the dangers of respiratory syncytial virus (RSV) and the benefits of a recently launched vaccine for pregnant women.

• The virus tends to attack mainly in the northern hemisphere between the months of September and March 
• RSV is a virus that primarily affects the upper and lower respiratory tract, and it's a very contagious virus 
• RSV is the leading cause of respiratory infections in infants