The Centers for Disease Control and Prevention has identified nearly 5,800 cases of people who were completely vaccinated against the disease transmitted by the COVID-19 coronavirus, but who became infected anyway, CNN reported. Some fell seriously ill and 74 people died, CDC said in an email to CNN. “So far, no unexpected patterns have been identified in the case of demographic or vaccine characteristics,” the CDC said. It is not unexpected to have these “advanced” cases, as vaccines are not 100% effective in preventing infections, so it is important that people continue to wear face masks and socially at a distance, even after being vaccinated. The agency said it will look for clues as to who is most likely to become infected despite having been vaccinated. “All people of all ages eligible for vaccination were reported to have advanced vaccine infections. However, just over 40% of infections were in people aged 60 or older,” he said. CDC.