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Fighting BackHow the Viruses were Wiped Out (3) Like macrophages, antibodies seek out foreign invaders. Unlike macrophages, they're very selective about what they attack. The ones produced by this last batch of B cells are after the strain of mumps virus that intitiated the counter attack, and only that strain. Many of these antibodies attach themselves to any mumps viruses they encounter. Attached antibodies acted as flags that say, "Here's one!" Continue... 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 |