As we inch into fall, people know to prepare for flu season, but what about RSV?

It stands for Respiratory Syncytial Virus and can feel like a cold to adults, but for babies, it can be much more serious.

Krista Steffy is a doctor at Baylor Scott and White and has a one-year-old son, Gabriel.

Last year, in the early months of his life, Gabriel suffered from the virus.

"Lots of congestion, seemed like it would get worse at night, waking up really frequently,” said Steffy.

Steffy said it started with a cough and fever that wouldn't go away.

"Kind of common cold things that lasted a long time,” said Steffy.

Baylor Scott and White Pediatrician Goddy Corpuz said that's typical with the virus, saying symptoms can last 6 to 12 weeks.

They see most cases between November and April, the same time as the flu.

"RSV and the actual flu go hand in hand together,” said Corpuz.

The virus can cause wheezing and even lead to pneumonia or asthma.

And with the congestion, it's dangerous for little ones.

"For babies that are not able to expel these secretions, cough it out and it stays in their lungs it can cause severe problems,” said Corpuz.

Corpuz said they've seen three cases in the Baylor Scott and White system in the past two weeks.

He said each year, 170,000 children are hospitalized with the virus.

As for Steffy, her son relapsed four weeks later. He's now okay, but she wants to warn other parents about the dangers.

"Baby wasn't sleeping well at night, wasn't eating very well too, so that was pretty stressful,” said Steffy.

Since it’s a virus, doctors say there isn’t a medicine cure, and it just has to run its course. But they remind people to wash their hands to prevent spreading germs.

You can find out more about RSV here.