随着美国准备应对流感，美国的流感病例正在上升潜在的严重季节。
在截至10月1日的一周内，有969例甲型流感和52例乙型流感病例报告给世界卫生组织疾病控制和预防中心。
此外，在同一时期，阳性率从0.49%上升到2.5%。
在截至10月1日的一周内，4岁及以下儿童的流感样疾病门诊人次尤其增加到了12万以上，比截至8月6日的一周该年龄组的约95，600人次增加了25.5%。
疾病预防控制中心此前警告说，在过去两年很少或没有病例报告后，美国可能会经历一个严峻的流感季节。
全州范围内也出现了类似的趋势。
根据世界卫生组织的数据，在纽约，截至10月1日的一周内，确诊了596例流感病例州卫生部。这比去年同期确认的150例高出近4倍。
此外，在德克萨斯州，卫生与公众服务部证实甲型和乙型流感422例截至10月1日的一周。去年同一周，没有确诊病例。
澳大利亚经历了五年来最严重的流感季节后，另一个潜在严重季节的迹象出现了。
根据该国的国家法定传染病监测系统在6月份的高峰期，每周有超过30，000个病例。
相比之下，在2017年澳大利亚流感高峰期，每周报告的病例为2.5万例。
研究人员和建模人员经常关注首先经历流感季节(通常从5月到10月)的南半球，以预测美国的流感季节会是什么样子。
上周，CDC主任Rochelle Walensky博士敦促6个月以上的美国人在10月底之前接种流感疫苗。
“在过去的两年里，我们已经看到一些令人担忧的流感疫苗接种覆盖率的下降，特别是在一些最有可能发展成严重流感疾病的人群中，”她在一次记者招待会。
今年早些时候，疾病控制中心发表了一份报告流感疫苗接种率下降。给出的一些原因包括混淆了新冠肺炎疫苗也可以预防流感，疫情期间人们去疫苗供应商的次数减少，以及与前几年相比流感疫苗接种诊所的开放次数减少。
Flu cases on the rise as US prepares for possibly severe season, data shows
Influenza cases are rising in the United States as the country prepares for apotentially severe season.
During the week ending Oct. 1-- the latest date for which data is available -- there were 969 cases of influenza A and 52 cases of influenza B reported to theCenters for Disease Control and Prevention.
What's more, over the same period, the percent positivity rate has risen from 0.49% to 2.5%.
Outpatient visits for influenza-like illnesses have particularly risen for children ages 4 and younger to more than 120,000 during the week ending Oct. 1, a 25.5% spike from the roughly 95,600 visits for this age group that were seen the week ending Aug. 6.
The CDC has previously warned the U.S. may see a harsh flu season after few to no cases were reported over the last two years.
Similar trends are being seen on statewide level.
In New York, 596 cases of influenza were confirmed the week ending Oct. 1, according to thestate's Department of Health. This is nearly four times higher than the 150 that were confirmed the same time last year.
Additionally, in Texas, the Department of Health and Human Services confirmed422 cases of influenza A and Bduring the week ending Oct. 1. During the same week last year,no cases were confirmed.
Another sign of the potentially severe season comes after Australia experienced its worst flu season in five years.
According to the country'sNational Notifiable Diseases Surveillance System, more than 30,000 cases were being per week during the season's height in June.
Comparatively, at the height of Australia's flu season in 2017, there were 25,000 cases being reported every week.
Researchers and modelers often look to the southern hemisphere, which experiences its flu season first -- typically from May to October -- to predict how the season will look in the U.S.
Last week, CDC Director Dr. Rochelle Walensky urged Americans ages 6 months and up to get a flu shot by the end of October.
"Over the past two years, we've seen some worrisome drops in flu vaccination coverage, especially in some groups of people who are at the highest risk of developing serious flu illness," she said during apress conference.
Earlier this year, the CDC published areportabout the drop in flu vaccination uptake. Some reasons given include confusions that COVID-19 vaccines also protect against the flu, people making fewer visits to vaccine providers during the pandemic and fewer flu vaccination clinics open compared to years prior.
