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If you are going to receive an “additional” or “booster” vaccine in the coming weeks or months and you did not initially receive Moderna’s mRNA vaccine, you may consider supplementing with Moderna, new study finds. .
A large study of 50,000 patients from the Mayo Clinic Health System found that the effectiveness of Pfizer and Moderna vaccines against the Delta variant decreased after six months, but the decrease was much greater in patients who received the Pfizer vaccine .
The study, which has not yet been peer-reviewed, found that the effectiveness of the Moderna vaccine against COVID increased from 86% in January 2021 – when the Alpha variant was more prevalent – to 76% in July, when the Delta variant was widespread across the country. During the same period, the efficacy of the Pfizer / BioNTech vaccine increased from 76% to 42%, suggesting that the Moderna vaccine maintains stronger protection against the Delta variant over time.
Dr Venky Soundararajan, who led the study and works for Massachusetts data analysis company nference, concludes that people looking for booster injections – especially those who initially received the Johnson & Johnson or Pfizer injections – should probably look for Moderna injections for better protection against Delta. variant, as reported by Reuters.
Just as other data has suggested so far, researchers have found that both vaccines are still very effective in preventing serious illness and hospitalizations. But Moderna seems to win out when it comes to preventing infection, months away from her injections.
Data from Israel also supports the new study. Researchers in Israel, where vaccine deployment was much faster than in the United States in December and January, found that among 34,000 people fully vaccinated – with the Pfizer vaccine – 1.8% had groundbreaking COVID infections . And the chances of getting infected increased dramatically after five months, they found, especially in people 60 and older. In fact, most of the breakthrough infections have been detected recently, as the effectiveness of the vaccine has apparently waned.
The vast majority of these infections appear to be mild and resulted in very few hospitalizations, according to study co-author Dr Eugene Merzon of Leumit Health Services.
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Photo: Ian Hutchinson
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