Which of the follow factors are important for a pathogen to cause a pandemic? Group of answer choices All of the above Must be spread through aerosol transmission Human-specific Short incubation period High basic reproduction number
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$\begin{equation} \begin{array}{l}{\text { To cause a human pandemic, the H5N1 avian flu virus would }} \\ {\text { have to }} \\ {\text { (A) spread to primates such as chimpanzees. }} \\ {\text { (B) develop into a virus with a different host range. }} \\ {\text { (C) become capable of human-to-human transmission. }} \\ {\text { (D) become much more pathogenic. }}\end{array} \end{equation}$
According to Diamand and Wolf, authors of The Perfect Plague, killer microbes have long posed a paradox for evolutionary biologists. Why would a microbe evolve to devastate the very habitat on which it depends? The answer stems from the fact that in order to survive over the long haul, any microbe restricted to humans must be able to spread from one victim to the next. How can microbes spread? 1. fly from one host to the next 2. walking from one host to the next 3. causing host to cough or sneeze 4. mutating within host's body e. all of the above 5. All of the above
Adi S.
Q6.5. Two directly transmitted viral diseases have the same basic reproduction number (R0), even though their dynamics are different. Which of the following differences between the two diseases could lead to the same basic reproduction number? One disease has a higher transmission rate and a longer recovery period than the other. One disease has a lower transmission rate and a longer recovery period than the other. One disease has a lower transmission rate and a shorter recovery period than the other. For one disease, the recovery period is long; for the other, no one recovers. Q6.6. Imagine that a new, deadly coronavirus arises and starts a global pandemic. Experts are worried because the disease spreads easily, having a basic reproductive number, R0, of 5. The good news is that an effective vaccine is quickly developed. What proportion of the population, pc, would need to be vaccinated to ensure that the disease can no longer spread?
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