The novel coronavirus may have infected people in the United States as early as Dec. 13, 2019, according to a study published Monday in the journal Clinical Infectious Diseases.
The study, which was conducted by scientists at the US Centers for Disease Control and Prevention, analyzed blood donations collected by the American Red Cross from Dec. 13, 2019 through Jan. 17, 2020.
The 7,389 samples, collected from nine states, were tested for SARS-CoV-2 reactive antibodies. SARS-CoV-2 is the scientific name for the coronavirus that causes Covid-19.
Of the samples tested, at least 106 were found to have antibodies for SARS- CoV-2, including ones collected from California, Oregon and Washington from Dec. 13 through Dec. 16, 2019.
Background SARS-CoV-2, the virus that causes COVID-19 disease, was first identified in Wuhan, China in December 2019, with subsequent worldwide spread. The first U.S. cases were identified in January 2020.
Methods To determine if SARS-CoV-2 reactive antibodies were present in sera prior tothe first identified case in the U.S. on January 19, 2020, residual archived samples from 7,389 routine blood donations collected by the American Red Cross from December 13, 2019 to January 17, 2020, from donors resident in nine states (California, Connecticut, Iowa, Massachusetts, Michigan, Oregon, Rhode Island, Washington, and Wisconsin) were tested at CDC for anti-SARS-CoV-2 antibodies. Specimens reactive by pan-immunoglobulin(pan Ig) enzyme linked immunosorbent assay (ELISA) against the full spike protein were tested by IgG and IgM ELISAs, microneutralization test, Ortho total Ig S1 ELISA, and receptor binding domain / Ace2 blocking activity assay.
Results Of the 7,389 samples, 106 were reactive by pan Ig. Of these 106 specimens, 90 were available for further testing. Eighty four of 90 had neutralizing activity, 1 had S1 binding activity, and 1 had receptor binding domain / Ace2 blocking activity >50%, suggesting the presence of anti-SARS-CoV-2- reactive antibodies. Donations with reactivity occurred in all nine states.
Conclusions These findings suggest that SARS-CoV-2 may have been introduced into the United States prior to January 19, 2020.
【 在 Urus (Macan她表弟) 的大作中提到: 】 : 读一下原文再嗷嗷 : https://academic.oup.com/cid/advance-article/doi/10.1093/cid/ciaa1785/ : 6012472 : Background : SARS-CoV-2, the virus that causes COVID-19 disease, was first identified in : Wuhan, China in December 2019, with subsequent worldwide spread. The first U : .S. cases were identified in January 2020. : Methods : To determine if SARS-CoV-2 reactive antibodies were present in sera prior to : the first identified case in the U.S. on January 19, 2020, residual : ...................
不一定武汉是头，但最早大面积爆发。人口密度小的地方不检测，媒体不报道就是流感。
From CNN Health’s Amanda Sealy
The novel coronavirus may have infected people in the United States as early as Dec. 13, 2019, according to a study published Monday in the journal
Clinical Infectious Diseases.
The study, which was conducted by scientists at the US Centers for Disease
Control and Prevention, analyzed blood donations collected by the American
Red Cross from Dec. 13, 2019 through Jan. 17, 2020.
The 7,389 samples, collected from nine states, were tested for SARS-CoV-2
reactive antibodies. SARS-CoV-2 is the scientific name for the coronavirus
that causes Covid-19.
Of the samples tested, at least 106 were found to have antibodies for SARS-
CoV-2, including ones collected from California, Oregon and Washington from Dec. 13 through Dec. 16, 2019.
抗体检测都是扯淡，拿孔子、鲁迅的血样也可能Coronavirus阳性。
瞎扯啥了，虽然说抗体检测不是最好的，但基本上还是可靠的，尤其是大量的样本。
【 在 THINKway (000) 的大作中提到: 】
: 抗体检测都是扯淡，拿孔子、鲁迅的血样也可能Coronavirus阳性。
中国有本事也测测50年代的血样，阳性不会少。
【 在 DaGe1 (未明大哥) 的大作中提到: 】
: 瞎扯啥了，虽然说抗体检测不是最好的，但基本上还是可靠的，尤其是大量的样本。
读一下原文再嗷嗷
https://academic.oup.com/cid/advance-article/doi/10.1093/cid/ciaa1785/
6012472
Background
SARS-CoV-2, the virus that causes COVID-19 disease, was first identified in
Wuhan, China in December 2019, with subsequent worldwide spread. The first U.S. cases were identified in January 2020.
Methods
To determine if SARS-CoV-2 reactive antibodies were present in sera prior tothe first identified case in the U.S. on January 19, 2020, residual
archived samples from 7,389 routine blood donations collected by the
American Red Cross from December 13, 2019 to January 17, 2020, from donors
resident in nine states (California, Connecticut, Iowa, Massachusetts,
Michigan, Oregon, Rhode Island, Washington, and Wisconsin) were tested at
CDC for anti-SARS-CoV-2 antibodies. Specimens reactive by pan-immunoglobulin(pan Ig) enzyme linked immunosorbent assay (ELISA) against the full spike
protein were tested by IgG and IgM ELISAs, microneutralization test, Ortho
total Ig S1 ELISA, and receptor binding domain / Ace2 blocking activity
assay.
Results
Of the 7,389 samples, 106 were reactive by pan Ig. Of these 106 specimens,
90 were available for further testing. Eighty four of 90 had neutralizing
activity, 1 had S1 binding activity, and 1 had receptor binding domain /
Ace2 blocking activity >50%, suggesting the presence of anti-SARS-CoV-2-
reactive antibodies. Donations with reactivity occurred in all nine states.
Conclusions
These findings suggest that SARS-CoV-2 may have been introduced into the
United States prior to January 19, 2020.
【 在 THINKway (000) 的大作中提到: 】
: 抗体检测都是扯淡，拿孔子、鲁迅的血样也可能Coronavirus阳性。
方法不行后面都是扯淡，有本事做核酸测序分析
【 在 Urus (Macan她表弟) 的大作中提到: 】
: 读一下原文再嗷嗷
: https://academic.oup.com/cid/advance-article/doi/10.1093/cid/ciaa1785/
: 6012472
: Background
: SARS-CoV-2, the virus that causes COVID-19 disease, was first identified
in
: Wuhan, China in December 2019, with subsequent worldwide spread. The first U
: .S. cases were identified in January 2020.
: Methods
: To determine if SARS-CoV-2 reactive antibodies were present in sera prior to
: the first identified case in the U.S. on January 19, 2020, residual
: ...................
想说自己文盲不用这么拐弯抹角
【 在 THINKway (000) 的大作中提到: 】
: 方法不行后面都是扯淡，有本事做核酸测序分析
: in
: U
: to
你没核酸检测结果想进中国会被当场击毙
【 在 Urus (Macan她表弟) 的大作中提到: 】
: 想说自己文盲不用这么拐弯抹角
你这个脑袋里是一桶浆糊
【 在 THINKway (000) 的大作中提到: 】
: 你没核酸检测结果想进中国会被当场击毙
美西海岸在Dec. 13-16就有39个Covid-19了。不知道是多少个样品里的，不过百分比够高了。