传染性巨强，看到一个新闻，60个人的合唱团排练了一次，45个人感染，期间注意了没有拥抱握手等身体接触。 Sixty singers showed up. A greeter offered hand sanitizer at the door, and members refrained from the usual hugs and handshakes. "It seemed like a normal rehearsal, except that choirs are huggy places," Burdick recalled. "We were making music and trying to keep a certain distance between each other." After 2½ hours, the singers parted ways at 9 p.m. Nearly three weeks later, 45 have been diagnosed with COVID-19 or ill with the symptoms, at least three have been hospitalized, and two are dead. The outbreak has stunned county health officials, who have concluded that the virus was almost certainly transmitted through the air from one or more people without symptoms. "That's all we can think of right now," said Polly Dubbel, a county communicable disease and environmental health manager. In interviews with the Los Angeles Times, eight people who were at the rehearsal said that nobody there was coughing or sneezing or appeared ill.
Sixty singers showed up. A greeter offered hand sanitizer at the door, and members refrained from the usual hugs and handshakes.
"It seemed like a normal rehearsal, except that choirs are huggy places," Burdick recalled. "We were making music and trying to keep a certain distance between each other."
After 2½ hours, the singers parted ways at 9 p.m.
Nearly three weeks later, 45 have been diagnosed with COVID-19 or ill with the symptoms, at least three have been hospitalized, and two are dead.
The outbreak has stunned county health officials, who have concluded that the virus was almost certainly transmitted through the air from one or more people without symptoms.
"That's all we can think of right now," said Polly Dubbel, a county communicable disease and environmental health manager.
In interviews with the Los Angeles Times, eight people who were at the rehearsal said that nobody there was coughing or sneezing or appeared ill.
这几天看了很多新闻，我渐渐觉得重症率高才是这个病毒最可怕的，国内很多医生也说，这个病毒造成医疗资源挤兑，病床不够，想想就知道这就是重症率太高造成的。致死率大家说的很多，大概是single digit，很多小年轻觉得100个人死1、2个，死的肯定不是我这样年轻力壮的。但是没什么媒体宣传重症率，其实重症率非常可怕，我看到的数据大多在百分之十几到20%这个范围，想想每5个感染的有1个要住院，就问那些还在外面浪的怕不怕？
是否有各年龄层的重症率？很多年轻人觉得20%都是老弱病残，轮不上他们，还是不怕。
下图，22个脑残聚会传染病毒，觉得可以获得免疫力，结果重症(2+6)/22=36%，全部35岁以下，可怕
下图是中国的重症比例，前面确诊（紫色柱子）高峰期，重症率（蓝色线条，坐标在右边）大概15-20%，后面确诊下降后重症率变高是因为轻的都恢复了分母变小了。
下图，severe + critical = 15%
最后再发个羟氯喹联合抗生素的好消息，是网友的anecdotal消息，不负责真实性/科学性哈，只是给大家一点点希望吧：
转发如下：有关纽约市的抗疫一角。
同学们大家好！我就是在被xx工抛天落地的"众所周知"的震中艾姆赫斯特医院工作。说些鼓舞的话吧。
1，原来说的两种药还在用。只是根据临床反应的副作用调整了剂量。有些病人会有心慌/胸痛的感觉。每天有EKG(心电图)监测，重的上telemetry24 小时观察。根本个别不同，再加 Ceftriaxone 广谱的， 也是静脉点滴。这个病临床很像疟疾，加两条毯子病人还在发抖
有的伴随拉肚子。一会就高烧F100多。碌奎plaquenil (hydroxychloroquine sulfate)400mg 口服3天， 一般都会退烧。有的反弹再加tylenol 650 mg 每4-6 小时一次。大部份体温会正常。当然同步跟进的还有阿奇霉素静脉点滴。虽然不是特效药，应该说效果还是相当不错。大约一周已有不少人症状明显好转，能走路有食欲转阴出院。总之治愈的人远比死亡的人多得多。
2，再把调整后的用药剂量说一遍:
Plaquenil 400 mg 口服 每天一次,每次疗程为3天
Azithromycin 500 mg 溶于250 ml NS 生理盐水，静脉点滴，每天一次，每次疗程为6天。
Ceftriaxone 1gm 溶于50 ml dextrose 葡萄糖 ，静脉点滴。每天一次 ， 疗程不等，最少为3次。
Tylenol 650mg 4-6 小时 一次。PRN when needed.
还有一种静脉点滴尚在试用中。
3，因为是公立医院，不问身份，不问收入，不问种族。可以说极大部份都是underbooked,homeless.医院所在地是西裔社区，很多人来自南美，不会讲英语。真正看到什么叫贫病交加。
4，病情来势凶猛，我们怆促应战。除了OB产房及肾透析以外，全院500张床位全部辟为隔离病房。人员及各种物资短缺。但是全院至今无一人请病假。不是我们不会感染，是没有查。看到有同事吃退烧药。就这样我们每人平等要照顾6-7个病人。除了打针喂药，更繁重的是照顾病人。翻身洗刷换尿布。还有每天经常性的抢救
。看我们披披挂挂的能包住就好。没有先救年轻的放弃年老的。都是谣言。先救病重的！
但是不少人的去世是一霎那，刚刚陪着上厕所还没回到床边就去了。所以血氧Spo2<90%的就严格卧床。
5，已有国民警卫部队驻进市里，除了增加医护人员，还有就是不能让巴尔的摹这样的爆乱再出现。网上的那些所谓自组抗击都是怂人听闻。在这里很少听说有拥枪的家庭，尤其是亚裔。
6，有不少已退休的医护志愿帮忙。真是雪中送炭！我们忙到没时间吃饭。他们的到来搭一把手真是让我们喘一口气！要知道他们是无偿的。
7，好在川普已和总书记打过电话，我们再苦撑一星期吧，有盼头了！下班时看到医院对面公园的栏杆上社区居民自发地树起两米多高的THANK YU!心里热了一下！
很多年轻人觉得这20%都是老弱病残，不是很care，我觉得要宣传一下这个重症率，让年轻人好好待家里
宣传这个重症，还不如宣传病毒损害生殖系统，以后都不能ooxx来的实在。这样那些年轻人估计都老实了
三十五岁以下出去浪感染的重症的不给治，第几个那些年轻的就消停了
对，这个也是一个很好的宣传点。
唉，周末开车出去兜了一圈，看到海滩上全是人，冲浪游泳，真是太担心了