RSV, norovirus, and the flu are all on the rise again and contrary to popular belief, hand sanitizer may not work to kill all of those germs. According to the Centers for Disease Control and Prevention,

The norovirus cases are reportedly rising in the US since December last year. The US CDC describes norovirus as “a highly contagious virus”. Here’s all you need yo know about it

These are the major germs that hand sanitizer won’t kill: Norovirus is a very contagious virus that causes vomiting and diarrhea—and sometimes both at the same time, per the Centers for Disease Control and Prevention (CDC).

There is also a chance norovirus can spread through the air from vomit, so those who are in close proximity to someone with norovirus, like health care workers or parents caring for a sick child, should consider wearing a mask to prevent infection.

Norovirus is known to cause some pretty nasty symptoms, but there are steps you can take to stay healthy and things you can do to feel better if you do get sick. Here’s what to