as per the title, infected marines are essentially immune to eggs/hugger traps/egg morpher/carrier infections, which makes pushing hive trivial
sure, facehuggers can’t infect you once you are already infected, but their tails still work, why wouldnt they be able to put you to sleep still? I think trap huggers probably shouldnt trigger as they are needed to get new infections in conflict zones, but eggs shouldnt ever be far from a nest. Carrier as well is all but helpless against an infected marine as they dont have any other forms of CC or self defense.