virus replication.

active aids anatomy bacillus bacteria biology capsid cell chromosome clinic cycle diagram disease dna education epidemic genome glycoprotein health healthcare hiv human illustration immune immunity immunodeficiency infect infection integrase integration latent lymphocyte medical medicine microbe microbes microbiology microorganism pathogenic protein provirus receptor recombination replication research retrovirus rna scheme schooling science scientific structure synthesis system target transcription vaccination vaccine vector viral virion virus viruses