Breakthrough Infections Less Likely to Cause Long-Term Covid, Study


People who experience breakthrough infections of the coronavirus after being fully vaccinated are about 50 percent less likely to experience long-term Covid-19 than unvaccinated people who have contracted the virus, the researchers said. great new report About British adults.

The study, published Wednesday in The Lancet Infectious Diseases, provides further evidence that the two-stage Pfizer-BioNTech, Moderna and AstraZeneca vaccines offer strong protection against symptomatic and severe disease.

D., a geriatrician at King’s College London and lead author of the study. “This is really the first study to show that long-term Covid was reduced and significantly reduced by double vaccination,” said Claire Steves.

Although many people with Covid recover within a few weeks, some experience long-term symptoms that can be debilitating. This constellation of lasting effects these happened Long known as Covid may include fatigue, shortness of breath, brain fog, heart palpitations, and other symptoms. But much about the situation remains mysterious.

Dr. “We don’t have a cure for long-term Covid yet,” Steves said. Getting vaccinated is “a prevention strategy that anyone can participate in,” he said.

The findings, so-called breakthrough infections among vaccinated people, the Centers for Disease Control and Prevention of the highly contagious Delta variant causing more of these breakthroughs More than other versions of the virus, but infections still tend to be mild in fully vaccinated people.

The new findings are based on data from more than 1.2 million adults in the Covid Symptom Study, where volunteers used a mobile app to record their symptoms, test results and vaccination records. Participants include those who received at least one dose of Pfizer, Moderna, or AstraZeneca vaccine between December 8 and July 4, and a control group of unvaccinated people.

The researchers found that of the nearly 1 million fully vaccinated people, 0.2 percent reported a new infection. Those who contracted breakthrough infections were roughly twice as likely to be asymptomatic than those who were infected and unvaccinated. The odds of being hospitalized in the breakthrough group was 73 percent lower than in the infected, unvaccinated group.

The likelihood of having long-term symptoms lasting at least four weeks after infection was also 49 percent lower in the breakthrough group.

Dr. “Of course, vaccines also greatly reduce your risk of getting infected in the first place,” Steves said. This reduced risk means that vaccination should further reduce the likelihood of long-term Covid, he said.

The study has limitations, the researchers agree, most notably that the data was all self-reported. It is also difficult to study Long Covid, with wide-ranging symptoms that can vary greatly in severity.

However, Dr. Steves said he hopes the findings will encourage more young people with lagging rates to get vaccinated. He noted that young adults are less likely to become seriously ill from the virus than older adults, but are still at risk for long-term Covid.

“Being sedentary for six months has a huge impact on people’s lives,” he said. “So if we can show that by getting them vaccinated, their personal long-term risk of Covid is reduced, that could be something that could help them decide to go ahead and get vaccinated.”


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