Trajectories are obtained by numerically integrating equations Equation 12, using parameters listed in Appendix 1—table 1 and additionally , , and . (A) For population compositions with a large majority of resistant cells (), phages get wiped out fast. (B) For intermediate (close to parameters where we observe both, collapsed and surviving, populations, see Figure 3), the populations exhibit a complex, non-monotonic trajectory. After fast initial growth of phages, bacterial populations decay but ultimately can recover. (C) If the fraction of susceptibles is too large (), the whole bacterial population is infected and succumbs to the overwhelming phage infection. See supporting text for more detailed information.