Despite widespread fear and uncertainty over coronavirus, a vaccine expert says the bigger threat to Americans is an illness that millions of people in the country catch every year.

“The three biggest risks to Americans: No. 1 influenza, No. 2 influenza, No. 3 influenza,” said Dr. Greg Poland, director of the Mayo Clinic’s Vaccine Research Group.

Poland said that the flu is a bigger immediate concern to Americans who don’t have to travel or won’t come into contact with someone who was recently in an area of China where there’s a high occurrence of coronavirus. China’s Health Commission reported Sunday that there are 475 recoveries and 361 deaths in the country so far.

“The risk of coming into contact with this novel coronavirus at this time in the U.S. is unquantifiably low,” Poland said.

The Centers for Disease Control and Prevention recently announced a second seasonal wave of the influenza virus. The 2019-20 flu season alone has seen an estimated 10,000 deaths and 180,000 hospitalizations, according to the CDC. There are currently fewer than 20 known coronavirus cases in the United States.

But with the international focus on coronavirus, Poland noted, legitimate concerns about influenza could be conflated with fear about coronavirus.

“It’s going to cause concern because everyone’s thinking it’s (an illness) coronavirus, but it isn’t coronavirus, it’s influenza” Poland said.

Getting a flu vaccine is one of the most important preventive steps people can take, he said. The seasonal flu vaccine protects against the influenza viruses that research indicates will be most common during the upcoming season. Most flu vaccines in the U.S. protect against four flu viruses, the CDC notes.

Despite the low prevalence of the coronavirus, many people are concerned about their risk of developing it. According to Google Trends’ Twitter account, interest in “coronavirus symptoms” increased by more than 1,000 percent the week of Jan. 20. In the U.S., searches for terms like “corona beer virus,” and “beer virus” have jumped in several states. The disease, however, has nothing to do with the popular beer brand, with the name instead being a nod to the crown-like spikes that appear on the virus.