By Amruta Khandekar (Reuters) – Hospitalization rates for unvaccinated children ages 5 to 11 were twice as high as among those who were vaccinated during the record COVID-19 surge caused by the Omicron variant, according to a U.S. study released on Tuesday. For every 100,000 unvaccinated children in the age group, 19.1 per were hospitalized with COVID-19 between mid-December and late February, compared with 9.2 per 100,000 vaccinated kids, the U.S. Centers for Disease Control and Prevention reported. The researchers looked at nearly 400 hospitalizations in 14 states during the period. It found…