I would like to suggest an article be written regarding the numerous false positive parvo results that are being given by vets after vaccination. I don’t think the manufacturers or the public can appreciate the numerous instances in which this happens. It is underreported by vets (due to the generated income) and not reported by naive pet owners who trust their vet’s judgment. Here are a few links to start off https://pubmed.ncbi.nlm.nih.gov/28093104/researching https://www.durvet.com/blog/canine-spectra-vaccines/
https://pubmed.ncbi.nlm.nih.gov/32899378/
https://www.durvet.com/wp-content/uploads/2017/12/Spectra-6_25ds.pdf