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On 6 July, Disease Control and Prevention Centers (CDC) confirmed that Delta had become theDominant variant COVID-19 In the United States after considering he was responsible for 51% of national cases. Experts and officials have increasing concern about the country's areas withLow vaccination rates will see overvoltages Due to the very contagious version of the virus circulating between the population. But what about people who have already received their shots? Fortunately, new data shed light on each vaccine available in the United States and protection against the Delta variant.

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According to a study published by the Israel Ministry of Health on July 5, the vaccine against Pfizer seemed somewhatLess protection against the delta variant other strains,Wall Street newspaper reports. The data collected during an epidemic caused by the strain between June 6 and early July determined that the efficiency of the vaccine fell from 94% to 64% to 64% against the VVID infection of the variant.

However, while he may not have stopped the propagation of the virus, there was still good news. The Israeli study also found that the Pfizer vaccine was still effective by 94% to prevent serious illness during the variant epidemic, only 97% established in previous studies.

Pfizer was not alone in seeing its efficiency decreased by the new strain. In a statement of 29 June published by Moderna, the company announced that, if its Roon Covid Vickcine showedPromising results Against the Delta variant, there was also a decline in the immune response compared to that of the original strain of the virus. Instead, the results showed that there was a reduction of 2.1 times of the antibody response generated when the last mutation resolution.

Moderna stressed that its vaccine always incited an antibody response against all variants that it tested, with all weaker than the response to the original strain of the virus. Interestingly, the vaccine was actually more efficient to produce antibodies against the delta variant that the beta version identified for the first time in South Africa a few months ago, which saw a reduction of six to eight times antibodies.

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No studies have yet been done on the single doseJohnson & Johnson Vaccine and its effectiveness against the delta variant. However, the Company announced in a statement of July 1 that research shows its shooting "generated a strong and persistent activity against the variant of Delta and other widely widespread variants".

"We believe that our vaccine provides sustainable protection against Covid-19 and a neutralizing activity against the Delta variant,"Paul Stoffels, MD, Vice-Chairman of the Johnson & Johnson Scientific Officer, said. "This adds to the robust clinical data body that supports the ability of our unique vaccine to protect against many variations of concern." According to the declaration, these two studies have been subject to printed in Biorxiv.

It should be noted that even if a handful of experts suggested that people who have obtained the Johnson & Johnson vaccine in consideringBoost A mRNA vaccine, such as Pfizer's moderna, others think it would be a useless precaution. During a White House Press Briefing July 1, Covid Councilor of the White HouseAnthony Fauci, MD, guaranteeing the effectiveness of the One-Shot vaccine. "As for the idea of ​​stimulating, there are a lot of discussion about this, but right now, I think we must always remember that the J & J vaccine is aVery efficient vaccine This has been very clearly recommended and has received an emergency authorization, "he said.

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