Flu season is here in New Jersey, but other illnesses are in full swing in the Garden State. Here are the symptoms and how long you're contagious.

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.

Most U.S. states are reporting high or very high flu-like activity, while COVID-19 rates remain lower than this time last year.

There’s no medication for norovirus. Instead, you’ll need to rehydrate as much as possible with water and other liquids. Seek help if you are dehydrated and notice you have a dry mouth and throat, aren’t urinating as much or feel dizzy when you’re standing up.

As the flu season goes into overdrive, how do you know if you have the viral infection or another of the nasty diseases that tend to be more prevalent in the winter?

Cold, flu, norovirus, and COVID-19 share overlapping symptoms like fever, cough, and fatigue, but differ in severity and duration. Handwashing, vaccines, and staying home when sick can help prevent infections.