State and federal data show high levels of respiratory illnesses. Here's what to know about the illnesses circulating this winter, their symptoms and how to prevent them.

Influenza A, COVID-19 and norovirus (stomach flu) are on the rise, according to the Centers for Disease Control and Prevention. But there's a fourth "bug" the public should be aware of: respiratory syncytial virus. RSV causes cold-like symptoms and affects the breathing passages and lungs.

Public health advice for HMPV is similar to that for flu, said John Tregoning, professor in vaccine immunology at Imperial College London. "Protecting yourself by being in well-ventilated (spaces), covering your mouth when you cough (and) washing your hands will all help," he said.

Several viruses are causing illnesses in Ohio and the U.S. See the symptoms for COVID-19, RSV, flu, norovirus and bird flu.

State Public Health Data shows flu and RSV hospitalizations are rising. Officials say this season is similar to pre-COVID years.