Common flu symptoms - fever/chills, cough, sore throat, runny nose, headache or body ache, fatigue or vomiting/diarrhea. If you have emergency warning signs of flu, or flu-related complications, go to the nearest ER immediately.

As flu activity reaches its highest levels in nearly a decade, it is important to take steps to prevent getting or spreading the illness. These include recognizing the signs and symptoms, and knowing when to go to the emergency department or seek care from another medical professional.

“This is a particularly dangerous flu season, and your first line of prevention is to take appropriate precautions including washing your hands and avoiding direct contact with ill people,” said Dr. Paul Kivela, president of ACEP.

“The most vulnerable patients are children, baby boomers aged 50 to 64, seniors, pregnant women and those with chronic conditions. Even though the flu shot is less effective this year, it still can reduce your risk of getting the flu and having serious complications.”

The flu shot is recommended for anyone over the age of 6 months, including pregnant women. You can avoid spreading germs by washing your hands, covering your mouth when you cough and staying home from work, school or other activities if you are not well.

“Most people with flu typically do not require emergency care, but this season’s disease strain is much more active than previous years. Public health experts project that tens of thousands of people could suffer flu-related deaths. If you have emergency warning signs or complications, go to the nearest emergency department immediately,” said Kivela.

In addition, Dr. Kivela said that emergency physicians seeing are increased cases of patients with irregular heart rhythms and heart attacks during or in the days after someone had the flu. Some people are also developing swelling in mouth or neck, which could be serious.

Cases have been reported in 49 states for weeks and more than 6 percent of all patients at clinics and emergency departments are there because they are showing flu-like symptoms, the Centers for Disease Control and Prevention reports.

If you have a non-emergency illness, first seek help with your primary care physician or urgent care.

Common flu symptoms include fever/chills, cough, sore throat, runny nose, headache or body ache, fatigue or vomiting/diarrhea. If you have any emergency warning signs of flu, or flu-related complications, please go to the nearest ER immediately.

CDC identifies these flu emergency warning signs:

For adults:

Difficulty breathing or shortness of breath Chest pain or abdominal pain Sudden dizziness Confusion Severe or persistent vomiting Flu-like symptoms that improve but then return with fever and worse cough Swelling in the mouth or throat Weakness

For children:

Fast breathing or trouble breathing Bluish skin color Not drinking enough fluids Not waking up or not interacting Being so irritable that the child does not want to be held Flu-like symptoms improve but then return with fever and worse cough Fever with a rash

In addition, seek medical attention for an infant who shows any of these signs:

Not able to eat Trouble breathing No tears when crying Significantly fewer wet diapers than normal

“If you have these warning signs, you should seek emergency care, even if your health insurance company tells you not to,” said Kivela.

Kivela added that Anthem Blue Cross Blue Shield this year implemented a dangerous policy to deny insurance coverage for visits that it decides are not emergencies, leaving ER patients who thought they were having emergencies with an expensive bill.

Flu-like symptoms are among the hundreds, or in some cases several thousand, conditions that Anthem is refusing to cover.

There is nearly a 90-percent overlap between emergency and non-emergency symptoms, according to the Journal of the American Medical Association. The policy is active in six states: Georgia, Indiana, Kentucky, Missouri, New Hampshire and Ohio.

Visit for more information on recognizing an emergency, choosing between the emergency department or urgent care and other topics.

Visit for specific information on the current flu season.

Visit learn more about Anthem’s dangerous policy.

ACEP is the national medical specialty society representing emergency medicine.