(CNN)As a dark winter approaches with "twindemics" of Covid-19 and the flu, an effort by the Trump administration to increase the number of children receiving flu shots is not working, according to a CNN investigation.

In August, the administration issued a declaration authorizing pharmacists nationwide to give flu shots to children ages 3 and older, which most states have not allowed.

"Today's action means easier access to lifesaving vaccines for our children, as we seek to ensure immunization rates remain high during the COVID-19 pandemic," US Health and Human Services Secretary Alex Azar said in a press release.