About 5,800 people who have been vaccinated against coronavirus have become infected anyway, the CDC tells CNN. Some became seriously ill and 74 people died, the CDC said. It said 396 -- 7% -- of those who got infected after they were vaccinated required hospitalization. It's the first indication from CDC of how effective the vaccine is in real life -- and the first indication the vaccines do not protect completely against severe disease and death. … To date, no unexpected patterns have been identified in case demographics or vaccine characteristics," the CDC told CNN via email.