Experts say it is highly contagious, and it only takes a small amount of the virus to infect a person. 

Health experts said the best way top protect yourself and those around you is by getting vaccinated.

Officials said neither child had been immunized against the viruses that caused their deaths.

As the weather gets colder, one Louisville doctor said more people are gathering with folks indoors.

Respiratory illnesses like COVID, RSV the flu and even some unnamed viruses are on the rise nationwide.

RSV is running rampant in Kentucky, infecting infants, kids and adults in record numbers.

The hospital added extra units to help care for more sick kids as the dangerous respiratory virus sweeps through the community.

Doctors at Norton Children's Hospital said there are more than 20 kids in the hospital currently being treated with RSV.

They are blaming air quality issues and students' return to classes for the spike.

Nationally, more than 150,000 people were hospitalized with COVID-19 this past week, 191 of those people were from Kentucky.