Hrvatski zavod za javno zdravstvo Služba za epidemiologiju zaraznih bolesti Zagreb, 24. veljače 2021. Dopuna uputa za cijeplje
![Blokovi.com on Twitter: Blokovi.com on Twitter:](https://pbs.twimg.com/media/FI1ZXdwXsAkb6aU.png)
Blokovi.com on Twitter: "@zerforschung I have now checked your theory with my PCR test from October 1st. I have downloaded it now from https://t.co/C4CHmmUAjU, scan QR code and timestamp from URL is
![Results of an early second PCR test performed on SARS-CoV-2 positive patients may support risk assessment for severe COVID-19 | Scientific Reports Results of an early second PCR test performed on SARS-CoV-2 positive patients may support risk assessment for severe COVID-19 | Scientific Reports](https://media.springernature.com/full/springer-static/image/art%3A10.1038%2Fs41598-021-99671-5/MediaObjects/41598_2021_99671_Fig1_HTML.png)
Results of an early second PCR test performed on SARS-CoV-2 positive patients may support risk assessment for severe COVID-19 | Scientific Reports
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