Went to Walgreens with my wife to get flu shots. In Michigan they are offering a three virus and a four virus shot. Our Aetna insurance ONLY covers the three virus shot at Walgreens, which they were out of. I then went to Rite Aid and got the four virus shot which was fully covered by our insurance. No cash out of pocket.<br /><br />Not sure why the coverage would vary between Walgreens and Rite Aid. Walgreens said only two or three insurance plans do not cover the four virus shot and our was one that doesn&#039;t so either Walgreens or Rite Aid made a mistake - who knows.<br /><br />Here is a CDC link that talks about the 2017-2018 flu season and the three and four virus shots. https://www.cdc.gov/flu/about/season/flu-season-2017-2018.htm 