中疾控发布！
<p style="text-align: center;"></p><p><br/></p><section data-role="outer" class="article135" label="edit by 135editor"><section data-role="paragraph" class="_135editor"><section style="margin: 1em 0px; padding: 16px; outline: 0px; max-width: 100%; text-align: justify; text-size-adjust: auto; letter-spacing: 0.54px; line-height: 25px; border: 1px solid rgb(204, 204, 204); color: rgb(255, 255, 255); background-color: rgb(180, 22, 22); border-radius: 4px; box-shadow: rgb(153, 153, 153) 0px 2px 8px; visibility: visible; font-family: -apple-system-font, BlinkMacSystemFont, Arial, sans-serif; box-sizing: border-box !important; overflow-wrap: break-word !important;" class="_135editor"><p style="line-height:2em"><span style="font-size: 17px; letter-spacing: 1px; font-family: Helvetica, Arial, sans-serif;">5月5日，中国疾控中心周报（CDC weekly）发布《预先计划的研究：奥密克戎变异株再次感染的相关因素——中国广东省，2022年12月至2023年1月》，研究结果显示，在首次感染新冠病毒奥密克戎变异株6个多月后，再次感染新冠病毒的几率明显增加。大多数再次感染病例都有症状，但只有少数人需要医疗干预。</span></p></section><p style="text-align:justify;margin-top: 0px; margin-bottom: 0px; padding: 0px; outline: 0px; max-width: 100%; clear: both; min-height: 1em; caret-color: rgba(0, 0, 0, 0.9); color: rgba(0, 0, 0, 0.9); letter-spacing: 0.544px; text-size-adjust: auto; visibility: visible; font-family: system-ui, -apple-system, BlinkMacSystemFont, Arial, sans-serif; box-sizing: border-box !important; overflow-wrap: break-word !important;"><br/></p><p style="text-align:justify;margin-top: 0px; margin-bottom: 0px; padding: 0px; outline: 0px; max-width: 100%; clear: both; min-height: 1em; caret-color: rgba(0, 0, 0, 0.9); color: rgba(0, 0, 0, 0.9); letter-spacing: 0.544px; text-size-adjust: auto; visibility: visible; line-height: 2em; font-family: system-ui, -apple-system, BlinkMacSystemFont, Arial, sans-serif; box-sizing: border-box !important; overflow-wrap: break-word !important;"><span style="font-size: 17px; letter-spacing: 1px; font-family: Helvetica, Arial, sans-serif;">文中介绍，2022年12月至2023年1月期间，广东省出现新冠病毒再次感染的情况。该研究调查了广东省的新冠病毒再次感染率和相关因素。所有的再次感染都是在2022年12月开始的第一波广泛社区传播中发现的。<span style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; color: rgb(171, 25, 66); visibility: visible; box-sizing: border-box !important; overflow-wrap: break-word !important;"><strong style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important; visibility: visible;">该研究估计，原始毒株原发感染的再感染率为50.0%；</strong></span>阿尔法或德尔塔变异株的再感染率为35.2%；奥密克戎变异株的再感染率为18.4%；奥密克戎变异株初次感染后3到6个月内的再次感染发生率为4.0%。<span style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; color: rgb(171, 25, 66); visibility: visible; box-sizing: border-box !important; overflow-wrap: break-word !important;"><strong style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important; visibility: visible;">此外，94.2%的再次感染病例有症状，但只有7.7%的病例需要医疗干预。</strong></span></span></p><p style="text-align:justify;margin-top: 0px; margin-bottom: 0px; padding: 0px; outline: 0px; max-width: 100%; clear: both; min-height: 1em; caret-color: rgba(0, 0, 0, 0.9); color: rgba(0, 0, 0, 0.9); letter-spacing: 0.544px; text-size-adjust: auto; visibility: visible; font-family: system-ui, -apple-system, BlinkMacSystemFont, Arial, sans-serif; box-sizing: border-box !important; overflow-wrap: break-word !important;"><br/></p><p style="text-align:justify;margin-top: 0px; margin-bottom: 0px; padding: 0px; outline: 0px; max-width: 100%; clear: both; min-height: 1em; caret-color: rgba(0, 0, 0, 0.9); color: rgba(0, 0, 0, 0.9); letter-spacing: 0.544px; text-size-adjust: auto; visibility: visible; line-height: 2em; font-family: system-ui, -apple-system, BlinkMacSystemFont, Arial, sans-serif; box-sizing: border-box !important; overflow-wrap: break-word !important;"><span style="font-size: 17px; letter-spacing: 1px; font-family: Helvetica, Arial, sans-serif;"><span style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; color: rgb(171, 25, 66); visibility: visible; box-sizing: border-box !important; overflow-wrap: break-word !important;"><strong style="margin: 0px; padding: 0px; outline: 0px; max-width: 100%; box-sizing: border-box !important; overflow-wrap: break-word !important; visibility: visible;">该研究结果显示，奥密克戎变异株初次感染后3至6个月内再次感染的风险较低。</strong></span>在首次感染奥密克戎变异株6个多月后，再次感染新冠病毒的几率明显增加。大多数再次感染病例都有症状；然而，只有少数人需要医疗干预，没有发现危重病例。无论病毒变异或上次感染后经过的时间如何，既往感染所赋予的保护可能有助于降低再次感染后重症的发生率。研究团队发现，医护人员的再次感染发生率高于其他人群。</span></p><p style="text-align:justify;margin-top: 0px; margin-bottom: 0px; padding: 0px; outline: 0px; max-width: 100%; clear: both; min-height: 1em; caret-color: rgba(0, 0, 0, 0.9); color: rgba(0, 0, 0, 0.9); letter-spacing: 0.544px; text-size-adjust: auto; visibility: visible; font-family: system-ui, -apple-system, BlinkMacSystemFont, Arial, sans-serif; box-sizing: border-box !important; overflow-wrap: break-word !important;"><br/></p><p style="text-align:justify;margin-top: 0px; margin-bottom: 0px; padding: 0px; outline: 0px; max-width: 100%; clear: both; min-height: 1em; caret-color: rgba(0, 0, 0, 0.9); color: rgba(0, 0, 0, 0.9); letter-spacing: 0.544px; text-size-adjust: auto; visibility: visible; line-height: 2em; font-family: system-ui, -apple-system, BlinkMacSystemFont, Arial, sans-serif; box-sizing: border-box !important; overflow-wrap: break-word !important;"><span style="font-size: 17px; letter-spacing: 1px; font-family: Helvetica, Arial, sans-serif;">此外，至少在未来三个月内，奥密克戎变异株在广东省引发大规模疫情的可能性相对较低。尽管如此，对新出现的新冠病毒变异株仍需保持监测，进行基于人群的常规抗体水平调查仍然至关重要。</span></p><p style="text-align:justify;margin-top: 0px; margin-bottom: 0px; padding: 0px; outline: 0px; max-width: 100%; clear: both; min-height: 1em; caret-color: rgba(0, 0, 0, 0.9); color: rgba(0, 0, 0, 0.9); letter-spacing: 0.544px; text-size-adjust: auto; font-family: system-ui, -apple-system, BlinkMacSystemFont, Arial, sans-serif; box-sizing: border-box !important; overflow-wrap: break-word !important;"><br/></p><p style="text-align:justify;margin-top: 0px; margin-bottom: 0px; padding: 0px; outline: 0px; max-width: 100%; clear: both; min-height: 1em; caret-color: rgba(0, 0, 0, 0.9); color: rgba(0, 0, 0, 0.9); letter-spacing: 0.544px; text-size-adjust: auto; line-height: 2em; font-family: system-ui, -apple-system, BlinkMacSystemFont, Arial, sans-serif; box-sizing: border-box !important; overflow-wrap: break-word !important;"><span style="font-size: 17px; letter-spacing: 1px; font-family: Helvetica, Arial, sans-serif;">中国疾控中心周报还发布了《预先计划的研究：第二波新冠肺炎奥密克戎变异株的时间和规模——189个国家和地区，2021年11月至2023年2月》，文中介绍，在大多数国家，由新冠病毒奥密克戎变异株引起的第二波疫情，出现在第一波疫情发生后的5至7个月内，第二波疫情的规模明显低于第一波疫情。此外，该研究结果显示，在151个北半球国家中，有107个国家发生第二波新冠感染的高峰时间，为2022年6月1日至8月30日，这表明温暖的天气对遏制疫情传播的影响有限。</span></p><p style="text-align:justify;margin-top: 0px; margin-bottom: 0px; padding: 0px; outline: 0px; max-width: 100%; clear: both; min-height: 1em; caret-color: rgba(0, 0, 0, 0.9); color: rgba(0, 0, 0, 0.9); letter-spacing: 0.544px; text-size-adjust: auto; font-family: system-ui, -apple-system, BlinkMacSystemFont, Arial, sans-serif; box-sizing: border-box !important; overflow-wrap: break-word !important;"><br/></p><section style="margin: 0px; padding: 0px; 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letter-spacing: 0.544px;">源：北京日报</span></span></p><p style="margin: 0cm 0cm 0.0001pt; padding: 0px; color: rgb(67, 74, 84); font-size: 14px; white-space: normal; background-color: rgb(255, 255, 255); max-width: 100%; min-height: 1em; font-family: -apple-system-font, BlinkMacSystemFont, Helvetica Neue, PingFang SC, Hiragino Sans GB, Microsoft YaHei UI, Microsoft YaHei, Arial, sans-serif; letter-spacing: 0.544px; line-height: 19.2pt; overflow-wrap: break-word !important; box-sizing: border-box !important;"><span style="letter-spacing: 0.544px; max-width: 100%; color: rgb(136, 136, 136); overflow-wrap: break-word !important; box-sizing: border-box !important;">制作：吴梦 | </span><span style="overflow-wrap: break-word; color: rgb(136, 136, 136); letter-spacing: 0.544px;">编辑：方丹 熊霞 | </span><span style="overflow-wrap: break-word; letter-spacing: 0.544px; color: rgb(136, 136, 136);">责编：方军</span></p><p style="margin: 0cm 0cm 0.0001pt; padding: 0px; color: rgb(67, 74, 84); font-size: 14px; white-space: normal; 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