ST. LOUIS (KMOV.com) -- SSM Cardinal Glennon Children's Hospital has seen a rise in influenza and RSV cases this season.
According to the hospital, they have seen a 40-50% increase in cases that have been spiking since the end of December.
More than 150 cases of flu and RSV have been reported this season, the hospital says.
"Our peak was late January - early February, so we're heading up to where we expect things to get really bad," said Dr. Ken Haller with SSM Cardinal Glennon.
RSV is similar to the flu in that causes upper respiratory infections, especially in younger children.
Doctors say it is more common to catch during the winter months.
"A lot is spread through droplets, sneeze, cough, come out of nose, throat thing is in winter time the air is dryer, so the droplets are smaller, they evaporate as they come out and they travel farther," said Haller.
Spending so much time indoors during the winter creates a breeding ground for germs.
Simple habits such as coughing in your elbow and washing your hands frequently will help prevent the spread of RSV and flu.