CEDAR RAPIDS — Sandra Byard felt hopeful and saw “a light at the end of the tunnel” as she and other Linn County school nurses and health secretaries received the first dose of the coronavirus vaccine this week.While the Cedar Rapids schools health services facilitator wishes teachers and other school staff were also receiving the COVID-19 vaccine now, each person who is vaccinated makes the world a little safer, she said.“We know they’re all at risk,” Byard said.