Influenza Division, National Center for Immunization and Respiratory Diseases, CDC.
MMWR Morb Mortal Wkly Rep. 2022 Jul 22;71(29):913-919. doi: 10.15585/mmwr.mm7129a1.
Before the emergence of SARS-CoV-2, the virus that causes COVID-19, influenza activity in the United States typically began to increase in the fall and peaked in February. During the 2021-22 season, influenza activity began to increase in November and remained elevated until mid-June, featuring two distinct waves, with A(H3N2) viruses predominating for the entire season. This report summarizes influenza activity during October 3, 2021-June 11, 2022, in the United States and describes the composition of the Northern Hemisphere 2022-23 influenza vaccine. Although influenza activity is decreasing and circulation during summer is typically low, remaining vigilant for influenza infections, performing testing for seasonal influenza viruses, and monitoring for novel influenza A virus infections are important. An outbreak of highly pathogenic avian influenza A(H5N1) is ongoing; health care providers and persons with exposure to sick or infected birds should remain vigilant for onset of symptoms consistent with influenza. Receiving a seasonal influenza vaccine each year remains the best way to protect against seasonal influenza and its potentially severe consequences.
在导致 COVID-19 的 SARS-CoV-2 病毒出现之前，美国的流感活动通常在秋季开始增加，并在 2 月达到高峰。在 2021-22 季节，流感活动在 11 月开始增加，并持续到 6 月中旬，呈现出两个明显的波峰，整个季节以 A(H3N2)病毒为主。本报告总结了 2021 年 10 月 3 日至 2022 年 6 月 11 日期间美国的流感活动情况，并描述了 2022-23 北半球流感疫苗的组成。尽管流感活动正在减少，夏季的传播通常较低，但仍需警惕流感感染，对季节性流感病毒进行检测，并监测新型流感 A 病毒感染。高致病性禽流感 A(H5N1)的爆发仍在继续；接触患病或感染鸟类的卫生保健提供者和人员应警惕出现与流感一致的症状。每年接种季节性流感疫苗仍然是预防季节性流感及其潜在严重后果的最佳方法。
