根据COVID跟踪项目，COVID-19住院和死亡的平均7天时间一直在下降。
健康数据显示，周三，七天平均住院人数为96534人。

追踪项目称，除佛蒙特州外，美国所有州和地区的七天住院率要么下降，要么没有变化。
根据健康数据，七天平均死亡人数为3039人。
“我们已经看到7天平均新增死亡人数在一周多的时间里有所下降，”跟踪项目说发微博。“与此同时，各州报告平均每天有3000人死亡。数据是有希望的，也是毁灭性的。”

锦标赛官员宣布，在一名酒店工作人员检测出新冠肺炎呈阳性后，所有的澳网赛事于周四被取消。
锦标赛组织者澳大利亚网球协会表示，所有锦标赛人员和球员都在酒店房间接受测试和隔离，直到他们得到否定的结果。

 

组织者说:“我们将与所有相关人员合作，尽快促进测试。”在一份声明中说。
组织者没有说住在墨尔本君悦酒店的运动员中有多少人会受到影响。
这是第二起导致澳网脱轨的新冠肺炎事件，此前一架将球员带到澳大利亚的特殊包机上的乘客也检测呈阳性。那次事件导致一些球员被限制在酒店房间两周。

 

根据卫生和公众服务部的一份报告，周二，接受第一剂疫苗的美国人数达到2710万，超过了美国迄今为止的新冠肺炎病例总数。
总的来说，8%的人口接受了一种或多种剂量。

根据约翰·霍普金斯大学的数据，美国有超过2650万人的新冠肺炎检测呈阳性。

根据伦敦帝国理工学院的一项研究，尽管老年人更容易患重病或死亡，但20岁至49岁的美国人是美国72.2%的新冠肺炎病毒传播的罪魁祸首。
 

研究发现，35岁至49岁的成年人对超过41%的传播负有责任。研究人员认为，这不是学校重新开放的结果，更有可能是因为社区的流动量。

该研究称，不到5%的病例来自9岁及以下的儿童，而不到10%的病例来自10至19岁的儿童。

The seven-day average for COVID-19 hospitalizations and deaths has been declining, according to The COVID Tracking Project.
On Wednesday, the seven-day average for hospitalizations was 96,534, the health data showed.

With the exception of Vermont, all U.S. states and territories have seen either declines or no changes in their seven-day hospitalization rates, the tracking project said.

The seven-day average for deaths was 3,039, according to the health data.
"We have seen the 7-day average for new deaths decrease for over a week," the tracking project tweeted. "At the same time, states are reporting an average of 3,000 people dying per day. The data is hopeful and devastating."

All Australian Open events were canceled Thursday after a hotel worker tested positive for COVID-19, tournament officials announced.
All tournament personnel and players are undergoing testing and isolating in their hotel rooms until they get a negative result, Tennis Australia, the tournament's organizers, said.

"We will work with everyone involved to facilitate testing as quickly as possible," organizers said in a statement.

Organizers did not say how many of the athletes staying at the Grand Hyatt Melbourne would be affected.

This is the second COVID-19 incident to derail the Australian Open after passengers on a special charter flight bringing players to Australia also tested positive. That incident caused a number of players to be confined to their hotel rooms for two weeks.

On Tuesday the number of Americans who've received a first vaccine dose reached 27.1 million, surpassing the number of total COVID-19 cases in the U.S. to date, according to a report from the Department of Health and Human Services.
In total, 8% of the population has received one or more doses.

Just over 26.5 million people have tested positive for COVID-19 in the U.S., according to Johns Hopkins University.

Despite older people being more likely to suffer severe illness or death, Americans between the ages of 20 and 49 were the ones responsible for 72.2% of COVID-19 spread in the U.S. according to a study from the Imperial College London.  

Adults ages 35 to 49 were responsible for more than 41% of spread, the study found. Researchers believe this was not the result of schools reopening, but more likely because of the amount of movement in the community. 
Less than 5% of cases originated from kids ages 9 and under, while less than 10% originated from children ages 10 to 19, the study said.