Cold and flu season is upon us/ Photo credit" Getty Images.

By Anshu Abhat, ABC Medical Unit

As flu season approaches, the Centers for Disease Control and Prevention expects expect about 200,000 Americans to be hospitalized with complications related to the seasonal bug.

Flu usually starts this month but really ramps up in late November and lasts through the spring. And this doesn't even take into account the enterovirus that's been surging through 44 states and the District of Columbia.

This week's ABC News Health Twitter chat, moderated by chief health and medical editor Dr. Richard Besser, explored questions about the flu, enterovirus, and flu vaccines. Infectious disease specialists, patients and the public discussed what you should know to stay healthy this flu season.

In case you missed it, scroll through the top seven tweets below.

Influenza is a serious disease. It's more than just a runny nose and sore throat. #abcDrBchat

- March of Dimes (@modhealthtalk) October 7, 2014

T6: Enterovirus D68 is a virus (or germ) that can cause an infection similar to the common cold #abcDrBchat

- Lucien Alexandre (@AlexandreMDPhD) October 7, 2014

T3: The very old, very young, pregnant women, and others with respiratory problems at greatest risk for #flu and complications. #abcDRBchat

- ABC News Health (@ABCNewsHealth) October 7, 2014

T7 If kids with #asthma get #Enterovirus or #flu, best to see your doctor and use asthma medications as prescribed #abcDrBchat

- UH Rainbow Babies (@UHRainbowBabies) October 7, 2014

T6 Enterovirus is scary, but not nearly as dangerous as flu. #abcdrbchat

- Bryan Sisk (@Sisk_MD) October 7, 2014

#abcdrbchat Stop flu and enterovirus from spreading- WASH YOUR HANDS, cover your cough, stay home. @RedCross to help protect your family

- Tom Kirsch (@DisasterProf) October 7, 2014

T5: Don't delay vaccination if your first #fluvax choice is not available. It's most important that you get vaccinated. #abcDRBchat

- Dr. Tom Frieden (@DrFriedenCDC) October 7, 2014