The Immune System at WorkThe Immune System at Work
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Video Cassette, 2004 ;
Current format, Video Cassette, 2004 ;, , All copies in use.
Video Cassette, 2004 ;
Current format, Video Cassette, 2004 ;, , All copies in use. Offered in 0 more formats
Explores germs, bacteria and toxins, and the body's natural defenses against them. It explains the difference between bacteria and viruses, and illustrates how the immune system protects against them. It also explains what happens when the immune system falters, and how vaccinations and other medical techniques help fight harmful germs and bacteria.
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