ジョンソン & ジョンソンワクチンはデルタ変異体に対して効果が低い, 研究は示唆している

ジョンソン & ジョンソンワクチンはデルタ変異体に対して効果が低い, 研究は示唆している
People still encouraged to take J&Jワクチン, but booster may be needed according to study

The single-shot Johnson & ジョンソン COVID-19 ワクチン may not be as effective against variants of the virus as other vaccines, による a new study.

Vaccines against the coronavirus are based on two different types of technology. ザ・ ファイザー そして モダン ワクチン, which use mRNA technology, appear to be more effective than J&J, the new study reports.

Published by bioRxiv on Tuesday, the study examined blood samples in a laboratory setting. It is yet to be peer-reviewed.

しかしながら, the conclusions align with a similar study of the AstraZeneca vaccine – which, like J&J, is also adenoviral vector-based – that was released by the British government in May.

That study concludes one dose of the vaccine is 33 per cent effective against symptomatic disease of the Delta variant and 60 per cent effective against the variant after the second dose.

The new study suggests that the 13 million people who received the single dose J&J vaccine in the US may need to receive a second dose, ideally either of the Pfizer or Moderna vaccine.

It says: “While a single dose vaccination has advantages, the benefit provided by a second immunisation may be well worth the inconvenience.”

“The message that we wanted to give was not that people shouldn’t get the J&Jワクチン, but we hope that in the future, it will be boosted with either another dose of J&J or a boost with Pfizer or Moderna,” Nathaniel Landau, a virologist at New York University’s Grossman School of Medicine who led the study, 言った ニューヨークタイムズ.

The results contradict a study published by Johnson & ジョンソン at the beginning of the month that says a single dose of their vaccine is effective against the Delta variant and others, showing that the durability of the immune response lasts at least eight months.

A Johnson & Johnson representative told the タイムズ that the data from the latest study “do not speak to the full nature of immune protection”.

独立者 has contacted the company for further comment.

The Delta variant now accounts for approximately 83 per cent of cases in the US, 疾病管理予防センターによると.

No vaccine is 100 per cent effective, as the rise in breakthrough cases of Covid in vaccinated people demonstrates, but they have proven effective in preventing serious illness, hospitalisation, and death.

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