<instructions>Your goal is to analyze the following comment and estimate how highly it will be upvoted by the Hacker News community.</instructions><comment><author>devit</author><text>This is the quote: &amp;quot;All samples came out to be negative for the presence of SARS-CoV-2 genomes with the exception of March 12, 2019, in which both IP2 and IP4 target assays were positive. This striking finding indicates circulation of the virus in Barcelona long before the report of any COVID-19 case worldwide.&amp;quot;.&lt;p&gt;And no discussion of the obvious possibility that they screwed up the testing, any discussion of whether they could repeat the test on another part of the sample or on the 2019 April-August samples they didn&amp;#x27;t test, or any sort of attempt at a Bayesian probability analysis.&lt;p&gt;Pretty ridiculous and shameful, I&amp;#x27;d say.</text><parent_chain></parent_chain></comment><story><title>SARS-CoV-2 detected in Barcelona sewage water sample from March 2019</title><url>https://www.medrxiv.org/content/10.1101/2020.06.13.20129627v1.full.pdf+html</url></story>
<instructions>Your goal is to analyze the following comment and estimate how highly it will be upvoted by the Hacker News community.</instructions><comment><author>koheripbal</author><text>This is one single frozen sample from March 2019 that was positive.  Note that subsequent frozen samples from later in 2019 were negative.&lt;p&gt;Without more data - I&amp;#x27;d chalk this up to a false positive or sample contamination.</text><parent_chain></parent_chain></comment><story><title>SARS-CoV-2 detected in Barcelona sewage water sample from March 2019</title><url>https://www.medrxiv.org/content/10.1101/2020.06.13.20129627v1.full.pdf+html</url></story>