Outreach programs helping close vaccination gap in Indian River County County boasts 67% senior vaccination rate Indian River County ranks in the top five in the state by percentage of seniors vaccinated, partly due to the number of outreach efforts. and last updated 2021-03-03 17:28:03-05 GIFFORD, Fla. â Indian River County ranks in the top five in the state by percentage of seniors vaccinated. That's partly due to the number of outreach efforts to make sure underserved communities are not overlooked. "I just had surgery on my neck for stage-four cancer," he said. The former Palm Beach County firefighter now lives in Indian River County and doesn't want to fear getting COVID-19.