How do sars and alds spread on the human society? 上“oh <Science> June 20. 2003 Modeling the sars epidemic Transmission Dynamics and Control of sars
How do SARS and AIDS spread on the human society? <Science>, June 20, 2003: Modeling the SARS Epidemic Transmission Dynamics and Control of SARS
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• Social relationships • Physical contacts
Did you have an experience of being infected b y some diseases?
Did you have an experience of being infected by some diseases?
Did your computers have some computer viruses V experiences of being infected b 88 websites infected. 90% users infected 50 billion USd per year for defense
Did your computers have experiences of being infected by some computer viruses? 88% websites infected, 90% users infected…….. 50 billion USD per year for defense
Viruses prevalence on the Internet Have your computers recently been attacked by some viruses Internet The so-big worm (Aug 11, 2003) 星 The blaster worm Domain 2 Domain 1 The Slammer virus,...... a virus can affect the whole Internet in 30 seconds to minutes, if without any countermeasures
Viruses prevalence on the Internet • Have your computers recently been attacked by some viruses? The So-big worm (Aug. 11, 2003), The Blaster worm , The Slammer virus,…… • A virus can affect the whole Internet in 30 seconds to minutes, if without any countermeasures