日韩精品久久一区二区三区_亚洲色图p_亚洲综合在线最大成人_国产中出在线观看_日韩免费_亚洲综合在线一区

Global EditionASIA 中文雙語Fran?ais
World
Home / World / Europe

Mixing vaccines 'safe and effective'

By ANGUS McNEICE in London | China Daily Global | Updated: 2021-05-20 09:20
Share
Share - WeChat
Vials with Pfizer-BioNTech and AstraZeneca coronavirus disease (COVID-19) vaccine labels are seen in this illustration picture taken March 19, 2021. [Photo/Agencies]

Combining first and second doses of the COVID-19 vaccines from AstraZeneca and Pfizer is both safe and effective, according to preliminary results from a Spanish study, which could have major implications for global vaccine roll-out.

Scientists at the Carlos III Health Institute in Madrid say that trial participants who received an AstraZeneca vaccine followed by a Pfizer vaccine showed a strong immune response with minimal side effects. The trial involved 441 participants tested alongside a control group of 232 people who did not receive a second dose.

"The response of the immune system is greatly enhanced after the second dose of the (Pfizer) vaccine, while the adverse effects observed are within what is expected," said authors of the study, which was released on Tuesday.

The data is good news for the vaccine effort, as the strategy of mixing treatments would allow for a more flexible and stable roll-out in areas where a specific vaccine is in short supply, or where regulations interrupt distribution. Some experts have also theorized that mixing vaccines might provide greater protection against variants.

After reviewing the new data, Spain's health department is set to authorize the use of the Pfizer vaccine as a follow-up shot among 1.5 million people under 60 years old who have already received the AstraZeneca jab, Spanish paper El Pais reported on Wednesday.

Spain had previously suspended use of AstraZeneca in under 60s due to a possible association with rare blood clots, leaving more than one million people who had already received one shot questioning whether they would get a full course. Spanish authorities are still considering whether the AstraZeneca restriction should be lifted for those who have already received one dose, according to El Pais.

British researchers are also studying whether combinations of COVID-19 vaccines provide sufficient protection. Preliminary results released last week from Oxford University's Com-Cov trial of 830 volunteers indicated that mixing doses of the Pfizer and AstraZeneca vaccine led to an increase in mild side effects, though adverse reactions were short-lived, and there were no other safety concerns.

In April, the ongoing United Kingdom trial recruited 1,050 more volunteers and expanded to test combinations of the Novavax and Moderna vaccines alongside the AstraZeneca and Pfizer treatments.

Matthew Snape, who is chief investigator of the UK study, said mixing vaccines could "massively increase the flexibility and resilience of the immunization program".

"It will mean we can roll these vaccines out more quickly, not just in the UK but internationally," Snape told the BBC.

Most Viewed in 24 Hours
Top
BACK TO THE TOP
English
Copyright 1995 - . All rights reserved. The content (including but not limited to text, photo, multimedia information, etc) published in this site belongs to China Daily Information Co (CDIC). Without written authorization from CDIC, such content shall not be republished or used in any form. Note: Browsers with 1024*768 or higher resolution are suggested for this site.
License for publishing multimedia online 0108263

Registration Number: 130349
FOLLOW US
主站蜘蛛池模板: 美女黄影院 | 免费观看呢日本天堂视频 | 边摸边吃奶边做激情叫床 | 日日日日日 | 毛片基地免费视频a | 黄色免费在线观看网址 | 91sao国产在线观看 | 久久综合九色综合桃花 | 亚洲三级视频 | 日韩在线观看视频黄 | 亚洲网站在线 | 毛片免费一区二区三区 | 中文字幕在线视频日本 | 一区二区三区在线播放 | 日韩欧美亚洲在线 | 国产成人精品免高潮在线观看 | 久草青青草 | 欧美精品1区| 精品专区 | 久草草视频在线观看免费高清 | 免费久久一级欧美特大黄 | 久久精品亚洲 | 成人黄色免费电影 | 久久久久免费视频 | 狠狠色噜噜狠狠狠狠2018 | 免费很黄很色裸乳在线观看 | 男女黄| 青青草视频网 | 在线视频国产一区 | 国产精品二区三区 | 午夜视频在线观看免费观看在线观看 | 久草在线国产视频 | 澳门永久av免费网站 | 亚洲天堂av在线 | 日韩二三区| 奇米影视亚洲精品一区 | 亚洲第一区精品观看 | 2021成人国产精品 | 毛片免费观看视频 | 欧美日韩一区二区中文字幕视频 | 色九月 |