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New COVID Sub-Variant BA 2.75 Detected in India, WHO Says_我的网站

A | 8月26日消息，据媒体报道，当地时间周二，世界首富马斯克旗下SpaceX公布了在路易斯安那州建设一座大型太空港的计划，项目投资规模高达1000亿美元。

B | 该公司计划未来每年从这里发射数千次庞大的星舰火箭。 The World Health Organization (WHO) has revealed that the new BA.2.75 sub-lineage of the Omicron variant of COVID has been detected in India.,"In Europe and America, BA.4 and BA.5 are driving waves. In countries like India, a new sub-lineage of BA.2.75 has also been detected, which we're following," WHO Director-General Tedros Adhanom Ghebreyesus said at a press briefing on Wednesday.,He said that new COVID cases reported worldwide have spiked by nearly 30 percent.,Experts say the BA.2.75 variant includes new mutations in the spike protein, in addition to mutations that are already present in the Omicron variant.,This allows it to evade several antibodies and can infect people who have been vaccinated or infected previously. The detection of BA.2.75 has led scientists across the globe to dive deep into the research to learn more about the new variant and the possibility of another COVID wave.,In India, the BA.5 sub-variant has been detected in the states of Tamil Nadu, Karnataka, West Bengal, Maharashtra, Telangana, Delhi, Haryana, Gujarat, and the Ladakh union territory as well.,WHO Chief Scientist Soumya Swaminathan said in a video posted on Twitter that there has been an emergence of a sub-variant called the BA.2.75, "first reported from India and then from about 10 other countries.",Swaminathan said there are still limited sequences available of the sub-variant to analyze, "but this sub-variant seems to have a few mutations on the receptor-binding domain of the spike protein. So obviously, that's a key part of the virus that attaches itself to the human receptor.","So we have to watch that. It's still too early to know if this sub-variant has properties of additional immune evasion or indeed of being more clinically severe. We don't know that," she added.,Last week, Dr. Shay Fleishon, an Israeli scientist, claimed that a new coronavirus variant had hit 10 Indian states and sparked concerns of a fourth wave of the COVID-19 pandemic.,The current daily positive test rate is, however, is around 4.32 percent, down from around 16-17 percent in January 2022, the peak of the first Omicron wave.。 马斯克在社交平台X上表示：“路易斯安那星基地最终将拥有超过12座发射塔，每天能够执行超过30次星舰发射，使其成为地球上最大的发射基地！” 据当地经济发展网站介绍，这座太空港预计将于明年底前在路易斯安那州南部沿海的维尔米利恩教区附近动工，最早可能于2029年执行首次发射任务。如果这一计划最终落地，将彻底改变SpaceX以及美国火箭产业的格局。路易斯安那州此前从未进行过轨道级火箭发射，而未来这里可能成为全球最繁忙的火箭发射基地。 SpaceX将把这座新园区命名为“路易斯安那星基地”，名称借鉴了该公司最近在得克萨斯州南部正式设立的“星基地”城镇。

C | 目前，得州星基地是星舰的测试和研发中心，也是星舰进行飞行测试的主要地点。截至目前，星舰已经从那里完成了13次试飞，这些测试飞行取得了不同程度的成功。不过，路易斯安那州基地的定位有所不同，这里主要负责星舰正式投入运营后的商业和任务发射，前提是星舰已经证明自己能够安全地将货物送入轨道。 SpaceX还计划让星舰的所有部件都能够着陆并回收，包括此前从未成功实现回收的上面级飞船，从而实现火箭快速重复使用，并进一步降低每次发射的成本。 这意味着路易斯安那州未来不仅会成为火箭发射中心，还将建设大量高达数百英尺的发射塔，用于在火箭和飞船从太空返回时对其进行捕获。

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