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Fighting BackWhat Happens (3) The macrophage seeks out a helper T cell. Not from any helper T, though. The cell has to recognize the fragments of the virus on the macrophage's surface. Once the macrophage encounters such a T cell, it and that T cell become united. The connecting of these cells sets into motion a series of events—events that, through a multifaceted yet focused attack, lead to the annihilation of the mumps viruses. Next: How the Viruses Were Wiped Out Search for a Vaccine | See HIV in Action | AIDS in Perspective The Virus Fighters | Fighting Back | Help/Resources Teacher's Guide | Transcript | Site Map | Surviving AIDS Home Editor's Picks | Previous Sites | Join Us/E-mail | TV/Web Schedule About NOVA | Teachers | Site Map | Shop | Jobs | Search | To print PBS Online | NOVA Online | WGBH © | Updated October 2000 |