The state of Iowa website isn't the best, but the hospitalization data in terms of vaccination is illuminating.
There are 24 COVID patients hospitalized from ages 0-19. 0 are fully vaccinated.
There are 26 COVID patients hospitalized from ages 20-29. 2 are fully vaccinated.
There are 44 COVID patients hospitalized from ages 30-39. 2 are fully vaccinated.
There are 65 COVID patients hospitalized from ages 40-49. 3 are fully vaccinated.
There are 113 COVID patients hospitalized from ages 50-59. 15 are fully vaccinated.
There are 150 COVID patients hospitalized from ages 60-69. 29 are fully vaccinated.
There are 111 COVID patients hospitalized from ages 70-79. 42 are fully vaccinated.
There are 101 COVID patients hospitalized from ages 80+. 50 are fully vaccinated.
83% of those over 65 are fully vaccinated.
So, basically of the 159 people under the age of 50 that are hospitalized due to COVID, a whopping 9 are vaccinated. Of the 272 under the age of 60 that are in the hospital, 22 are vaccinated.
You can also look at the higher percentage of those vaccinated that are testing positive over 65 years of age - but also look at the lower numbers period of those in the hospital in a very high risk population.