专业人士已经有人质疑方法了。
the authors do not detect SARS-CoV-2 in samples from 2019 March. Rather, they do detect IP2/IP4 resembling SARS-CoV-2. Whatever virus it is it does not have the E and N1/N2 of SARS-CoV-2. Fluctuations in qRT-PCRs even in 2020 samples -different sewers- are way too high to trust the reliability of the RT-PCRs. However, their approach is amazing. I hope they use a metagenomic approach to sequence to sewers rather than doing an RT-PCR assay, which doesn't look very rigorous.
https://www.medrxiv.org/content/10.1101/2020.06.13.20129627v1.full.pdf+html
Sky News, 路透社，澳洲的7 News都报道了，其他媒体就不一一举例了。
懂英文嘛？不懂可以给你翻译下。
别总是逢中必反，吃相太难看。
“The research has been submitted for peer review after the sample was found by a team from the University of Barcelona, which has been testing waste water since mid-April.
"The levels of SARS-CoV-2 were low but were positive," research leader Albert Bosch was quoted by the university as saying.”
低智生物
Coronavirus: Spanish researchers say they've found coronavirus trace in March 2019 water sample
The finding comes from a single sample and researchers say more would be needed to confirm the result.
Saturday 27 June 2020 04:21, UK
西班牙巴塞罗那大学26日发布公告称，该校领导的一个研究小组在去年3月采集的巴塞罗那废水样本中检测出新冠病毒。
公告称，巴塞罗那大学肠道病毒小组的研究人员对当地废水样本做了检测，结果发现在去年3月12日采集的废水中已有新冠病毒的踪迹，此前该小组的研究人员已在今年1月15日的废水样本中检测到了新冠病毒的存在。而西班牙本土直到今年2月25日才报告首例新冠确诊病例。
领导该研究小组的生物学教授阿尔韦特·博什称，研究小组随后检查了2018和2019年的废水样本，目前仅有2019年3月12日的样本聚合酶链式反应（PCR）检测呈阳性，且病毒水平非常低，其他所有样本的检测结果均为阴性。他认为，巴塞罗那旅游业发达，游客众多，这一研究结果表明世界其他地区很可能也发生了类似情况，但许多病例或因被误诊为流感病例而被掩盖。