The flu vaccine is safe for most people, but some people could experience dangerous complications from the flu vaccine, including an allergic reaction.

The U.S. Centers for Disease Control and Prevention says the following people should not get a flu shot without first speaking to their doctor:

If you have a carbon monoxide detector in your home, you also need to be prepared with an action plan in case the alarm sounds.

The National Safety Council offers these suggestions if there may be a carbon monoxide leak in your home:

The annual flu shot is recommended for most people, but certain people are at particularly high risk of contracting the nasty bug and its complications.

The U.S. Centers for Disease Control and Prevention says these people should be vaccinated every year:

Tooth decay is among the most common medical conditions, second only to the common cold, the U.S. National Library of Medicine says.

The agency offers these suggestions to help keep your teeth healthy and cavity-free:

You've heard it over and over, starting from your parents: "Wash your hands."

But if you knew why it's so important, handwashing would always be on the top of your list of ways to stay healthy, says the U.S. Department of Agriculture.