2020年3月26日 · Influenza A(H1N1)pdm09 circulation increased in late December 2019; as of January 31, 2020, all A(H1N1)pdm09 viruses antigenically characterized at CDC were similar to the cell-propagated vaccine reference virus for the A(H1N1)pdm09 component of the 2019–20 Northern Hemisphere vaccine.

During H1N1, clinical laboratories forwarded untypable pathogens to the American CDC laboratories timely. The laboratories confirmed the emergence of a new strain of influenza, which triggered a massive public health response.

2021年4月16日 · Both 2009 H1N1 influenza and COVID-19 are respiratory infections that share many symptoms in common. These can include: One symptom that’s unique to COVID-19 is loss of smell and taste. The 2009...

Influenza A (H1N1) virus often compromises the respiratory tract, leading to pneumonia, which is the principal cause of death in these patients. The purpose of this study was to review the acute and late phase pulmonary findings in influenza A(H1N1) ...

2025年3月3日 · 目的 分析甲型h1n1流感病毒流行病学特点及并发肺部疾病的危险因素.方法 回顾性分析中国人民解放军空军军医大学第一附属医院感染性疾病科在2020年1月至2023年12月收治的156例甲型h1n1流感患者的临床资料,将其分为并发肺部疾病组(68例)和未并发肺部疾病组(88例),分析甲型h1n1流感病毒流行病学特点 ...

2020年1月27日 · 甲型H1N1流感是猪的一种高度传染性急性呼吸道疾病，由一种或多种猪流感A型病毒引起，发病率较高，但死亡率偏低 (1-4%)。2009年4月，甲型H1N1流感开始在墨西哥爆发，至2010年5月, 全球214个国家和地区超过130 万人感染H1N1，总死亡人数约为1.8万人，患者平均死亡率为1.3%。 到2010年6月，墨西哥共有超过7万例确诊病例，1300多人死亡。 2009 年墨西哥人口为1.15亿，有万分之6的墨西哥人感染H1N1流感。 2010年8月，世卫组织宣布甲 …

了解河北省2017—2020年流行期甲型H1N1流感的流行病学特征及血凝素 (haemagglutinin, HA)基因变异进化情况，为流感防控提供科学依据。 从中国流感监测信息系统下载河北省2017年4月至2020年3月流感监测数据进行统计分析，选择期间分离的37株甲型H1N1流感毒株，对HA基因进行测序和进化分析。 河北省2017—2020年共检测流感样病例 (influenza like illness, ILI)咽拭子标本57 670份，流感病毒核酸阳性8 569份，阳性率为14.86%，其中甲型H1N1占总阳性的比例 …

A5a.1 and A5a.2 clade H1N1 viruses cocirculated in the 2019–2020 influenza season in the Northern Hemisphere, with clade A5a.1 predominating (Fig. 1A). A5a.1 and A5a.2 are distinguished by several distinct clade-defining mutations on the hemagglutinin protein (Fig. 1 B).

strains of influenza A (H1N1) pdm09 virus isolated in Hebei during 2017–2020 were selected for oseltamivir and zanamivi resistance tests with fluorescence radiation assay. A total of 38 strains of influenza A (H1N1) pdm09 virus were selected for

2025年3月6日 · Flu season typically lasts from October through April in the Northern Hemisphere each year, peaking between December and February. But from 2020–2022, the first two years of the COVID pandemic ...