と報告。 ウイルス量が多く、曝露から感染の検出までの時間が短いことからウイルスが初めて検出されたときの感染性/伝播性のリスクが高い。 medrxiv.org/content/10.110…
Our results revealed that the time interval from exposure to the first PCR+ test in the quarantined population was 6.00 days
(IQR 5.00-8.00) during the 2020 epidemic (n=29; peak at 5.61 days) and 4.00 days (IQR 3.00-5.00) in the 2021 Delta epidemic (n=34; peak at 3.71 days; Figure 1c).
We next evaluated viral load measurements at the time when SARS-CoV-2 was first detected by PCR in each subject.
The relative viral loads of cases infected with the Delta variant (n=62, Ct =24.00 for the ORF1ab gene, IQR 19.00~29.00) were 1260 times higher than those for the 2020 infections with clade 19A/19B viruses (n=63, Ct = 34.31 for ORF1ab gene, IQR 31.00~36.00) on the day
when viruses were first detected (Figure 1d).
デルタ株による大規模なアウトブレイクにおけるウイルス感染と伝播→ウイルス量が初期のものより1260倍も多い! marugametorao.wordpress.com/2021/07/17/%e3…
Viral infection and transmission in a large well-traced outbreak caused by the Delta SARS-CoV-2 variant
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Sheikh A, et al. SARS-CoV-2 Delta VOC in Scotland: demographics, risk of hospital admission, and vaccine effectiveness. The Lancet. 2021;397(10293):2461-2462. doi.org/10.1016/S0140-…
スコットランドにおけるデルタVOCは、主に若くて裕福なグループに見られることがわかった。
ワクチンを接種していない人に比べて、より短い時間でウイルスを拡散する可能性がある。 cdc.gov/mmwr/volumes/7…
Weekly / August 6, 2021 / 70(31);1059-1062
Massachusetts residents who had traveled to the town during July 3–17; 346 (74%) occurred in fully vaccinated persons.
cdc.gov/coronavirus/20…
The principal mode by which people are infected with SARS-CoV-2 is through exposure to respiratory fluids carrying infectious virus. Exposure occurs in three principal ways: (1) inhalation of very fine respiratory droplets and aerosol particles
Breakthrough infection with SARS-CoV-2 and its predictors among healthcare workers in a medical college and hospital complex in Delhi, India medrxiv.org/content/10.110…
平均(SD)年齢29.1(9.9)歳の325名のHCWが登録され、そのうち211名(64.9%)が男性。2.79人(85.8%)のHCWが完全に