Some bacteriophages inject their genomes into bacterial cells (not to scale) Viral populations never increase through mobile division, given that they are acellular. This is called DNA chain termination.[171] Samples of nucleoside analogues are aciclovir for Herpes simplex virus infections and lamivudine for HIV and hepatitis B virus infections. https://www.youtube.com/watch?v=TynzhQNcxK8