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Neglected benefits
The researchers, led by epidemiologist Ziyad Al-Aly at the St. Louis VA, also looked at MACE and deaths without documented COVID-19 cases. Here, the benefits of COVID-19 vaccines were stronger, suggesting COVID-19 cases may have been missed or undiagnosed. The shots appeared to drop the rate of MACE from 382 per 10,000 to 358, and the rate of death from 223 to 207.
“Extrapolating these estimates to a population of 1 million people, vaccination could plausibly be associated with averting approximately 2,370 MACE events and 1,580 deaths over an 8-month period,” the researchers note, though they urge caution in interpreting the finding.
The study has limitations, including that most of the US veteran population is older, White, and male, making it likely that the findings can’t be generalized to the whole population. Still, the findings indicate that the vaccines continue to offer cardiovascular protection against COVID-19, which should factor into people’s decisions on whether to get an annual COVID-19 booster. An accompanying study also published in JAMA Internal Medicine on Monday found the vaccines still directly protect against COVID-19, reducing the risk of hospitalization and critical illness by 35 percent and 41 percent, respectively.
In an accompanying editorial, Robert Califf, a cardiologist and former Food and Drug Administration commissioner, wrote that the data from the two studies “provide strong evidence of a favorable balance of benefit to risk for updated COVID-19 vaccine boosters across the population.” But, he lamented that despite that strong evidence, national views are being swayed by the “general antivaccination statements from the US Department of Health and Human Services,” which is run by anti-vaccine Health Secretary Robert F. Kennedy Jr.
Only 17.5 percent of adults and 22.6 percent of people over age 65 in the US have gotten the 2025–2026 COVID shot, according to federal data.
“The politicization of COVID-19 vaccination and messenger RNA vaccines in general has taken a toll on the longevity and functional status of those in the US,” Califf wrote. He called for researchers to collect more data on the vaccine’s benefits and engage with the public about the findings, particularly on social media, to combat anti-vaccine rhetoric.
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