I'm running plaque assay with 10 serial 10-fold dilutions of VSV viral stock that I've harvested a while ago. It's been 18 hours now after infection and agar overlay. The cells in all 10 wells (I used 6-well plates) look similar, but all of them are round. I wonder if all the cells are died at some point and if there's any sense to continue monitoring them for a longer time. Agar was cooled down