If you've woken up with sweaty palms, shaky hands and a grumbling stomach begging for relief, you're not alone. The new year brought a warm winter, new habits and an uptick of norovirus — commonly called the stomach flu.

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.