Sort of. There are now reagents that can fluoresce as the strand is elongated allowing instantaneous reading. Also, for an RNA virus, it starts with reverse t

Sort of. There are now reagents that can fluoresce as the strand is elongated allowing instantaneous reading. Also, for an RNA virus, it starts with reverse transcriptase. https://en.m.wikipedia.org/wiki/Real-time_polymerase_chain_reaction https://en.m.wikipedia.org/wiki/Real-time_polymerase_chain_r...