Why even fully vaccinated older people are at high risk for severe COVID-19

Why even fully vaccinated older people are at high risk for severe COVID-19 Many factors weaken the aging immune system. But vaccines—and booster doses—do offer protection from hospitalization and death. Science

Mounting data suggest that older people are at higher risk of severe disease from a breakthrough infection of COVID-19—and scientists say that should come as no surprise. After all, older age brackets have been disproportionately at risk throughout the pandemic, and that continues to be true even once someone is fully vaccinated.

Concerns about breakthrough infections bubbled up again this week when news broke on October 18 that former Secretary of State Colin Powell had died after contracting COVID-19. Powell was 84, but his cause of death was more complex: The former statesman suffered from multiple myeloma, a cancer of white blood cells. People with this form of cancer tend not to respond well to vaccines.

But in addition to the immunocompromised, health officials are seeing worrying evidence that older age groups continue to be at higher risk from the pandemic. According to the latest data from the Centers for Disease Control and Prevention, people over 65 account for 67 percent of hospitalizations and 85 percent of deaths from breakthrough cases. And recent media reports citing data from Seattle, Washington, and the United Kingdom show that older vaccinated people face similar—and, in some cases, greater—risks of severe disease than unvaccinated children.

“The huge risk factor is age,” says William Petri, an immunologist at the University of Virginia. That’s why the U.S. prioritized vaccinating older people and those in long-term care facilities when it first rolled out the vaccines, he explains. “If you’re under 45, your chances of dying are almost nonexistent, and then it increases exponentially.” ...