The Centers for Disease Control and Prevention said in June that it is trying to ensure healthcare providers have an ample supply of influenza vaccines for the upcoming flu season. 

CDC Director Robert Redfield said the agency is working with drugmakers to hike vaccine availability and safe testing options.

The effort is an attempt to head off a potential wave of flu and COVID-19 infections. This year, about 60% of U.S. adults say that they plan to get a flu shot, according to a recent Reuters/Ipsos poll. That is significantly more than in past years.