div class=ts-pagebutton class=gotoPage data-page=1Page 1button div class=ts-imageimg data-url=certificate-of-performance-corona-virus-1-the-above-titer-of-virus-was-testedhtmlpage=1 data-page=1 class=ts-thumb lazyload alt=Page 1: Certificate of Performance - Corona Virus 1 · the above titer of virus was tested for viral presence by cytopathic effect observation on cell culture 5 Test result: No multiplicity loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAQAAADYv8WvAAAAD0lEQVR42mP8X8AwAgiABKBAv+vAXklAAAAAElFTkSuQmCC data-src=https:reader034vdocumentsnetreader034viewer202205200360165b7b9dd43a71c23245e5html5thumbnails1jpg width=140 height=200 divdiv