Getty Images North America Even in Iowa nursing homes where a half-dozen residents or more have died of COVID-19, the percentage of workers who have been vaccinated against the virus is as low as 48 percent. A small survey of health care workers in Iowa care facilities suggests many of them don’t believe the COVID-19 vaccines are safe. The survey by Iowa Caregivers elicited responses from only 20 direct-care workers, but the results are consistent with some of the broader, national surveys and findings by the Centers for Medicare and Medicaid Services and others. Of the 20 Iowa caregivers who responded to the April survey, 10 indicated they had not been vaccinated. Of those 10, all said access was not an issue and they were simply refusing the get the vaccine.