久久亚洲国产成人影院-久久亚洲国产的中文-久久亚洲国产高清-久久亚洲国产精品-亚洲图片偷拍自拍-亚洲图色视频

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

Hurdles remain to be cleared as UK fires starting gun on mass vaccination

By ANGUS McNEICE in London | China Daily Global | Updated: 2020-12-03 11:01
Share
Share - WeChat

But scientists warn that much work lies ahead. It may be worth asking the question: What if developing the vaccine was the easy part? The logistical challenge of manufacturing and disseminating treatments is enormous, especially in the case of the Pfizer vaccine, which requires storage at ultra-cold temperatures.

Developed countries like the UK will have an easier time distributing the Pfizer jab than nations that do not have robust cold-chain infrastructure, according to Robert Lechler, president of the Academy of Medical Sciences.

"The Pfizer-BioNTech COVID-19 vaccine does come with challenges such as storage at around minus 70 C which is why I am pleased that there are other promising vaccines that could be approved for use soon," Lechler said.

Some other COVID-19 vaccine candidates can be stored at higher temperatures for longer periods, including the so-called Oxford vaccine, which was shown to provide up to 90 percent protection in interim Phase 3 results published last month.

Chinese manufacturers have several vaccine candidates in the pipeline that do not require ultra-cold storage, including a treatment developed by Sinovac that produced a strong immune response in Phase 1 and Phase 2 testing, with results from largescale Phase 3 testing coming soon.

Vaccine makers from China have already agreed to deliver tens of millions of doses to numerous developing nations around the globe.

"Really, the way we are going to deal with this pandemic globally is by having a variety of vaccines available using different technologies, and, crucially, some of those need to not have cold-chain issues," said Andrew Catchpole, chief scientist at London-based vaccine testing lab hVIVO. "And this is not uncommon, most infectious diseases for which we have vaccines are actually collectively delivered by a number of different vaccine manufacturers."

Scientists have warned it is still unclear for how long the vaccine will provide protection, or whether people who are vaccinated will still be able to spread the virus.

"Today is a good news day, however, we do have to acknowledge several key things," said Stephen Evans, who is a professor of pharmacoepidemiology at the London School of Hygiene and Tropical Medicine. "We will not be able to change distancing, maskwearing etcetera for quite some time, months at least, and we don't yet know when or whether that will stop."

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: 久久―日本道色综合久久 | 欧美性猛交xxxxbbb | 国产99久9在线视频 国产99久久 | 亚洲二区在线播放 | 欧美成人全部费免网站 | 真实国产普通话对白乱子子伦视频 | www.久草.com| 无套内谢孕妇毛片免费看 | 欧美人拘一级毛片 | 精品久久网 | 亚洲爽视频 | 8050网午夜一级毛片免费不卡 | 精品厕拍| 在线成人97观看 | 手机在线观看亚洲国产精品 | 亚洲国产日韩精品 | 黄色a三级免费看 | 久久精品免视着国产成人 | 欧美三级色 | 国产成人精品一区二区视频 | 成人网在线免费观看 | 免费看一级毛片欧美 | 深夜做爰性大片中文 | 国产精品秦先生手机在线 | 亚洲品质自拍视频 | 亚洲人成网站观看在线播放 | 一级特色黄大片 | 亚洲视频日韩视频 | 深夜福利视频在线观看免费视频 | 一级女性黄 色生活片 | 国产午夜精品久久理论片 | 91久久99| 久久影院在线 | 久久精品免费观看久久 | 久久精品成人一区二区三区 | 91精品一区二区综合在线 | 久久久久亚洲日日精品 | 91成人午夜性a一级毛片 | 精品亚洲永久免费精品 | 亚洲国产成人久久精品图片 | aaaa毛片 |