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by canalon
Thu Feb 03, 2005 5:05 pm
Forum: General Discussion
Topic: Exception to Characteristics of Life.
Replies: 57
Views: 74713

Hello, Virus can carry both RNA or DNA, but it cannot self replicate, it needs a cell replication mechanism to copy and multiply its genetic materia and to synthesize its enveloppe. They are basically genetic material wrapped in a membrane, without any machinery. Prions do not carry genetic material...
by canalon
Thu Feb 03, 2005 2:52 pm
Forum: Microbiology
Topic: vaccination
Replies: 9
Views: 16159

Hi, Another reason for the possibility of eradication of smallpox, polio and measles is the host specificity of the virus. Since human beings are the only reservoir, the vaccination of humans is sufficient to oeradicate the virus. But for most of the diseases, human is just an opportunistic host for...