Interestingly, in both hosts, the average virulence of mixed infections was that of the more virulent genotype (N for Host 1, N and A for Host 2), a condition that according to some analyses should prevent genotype co-existence in mixed infections (Alizon 2008).
Since the host population is finite, some of these potential infections may fall at random on the same susceptible host, so the average number of realized infections in general, will be smaller.
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In the beginning of the simulation, on each host, on the average, 3 VMs (leading to a total of 300 VMs) are scheduled.
Note that when direction of inoculums transmission between hosts changed, the average virulence did not vary in Host 1 in parallel with infection frequency, while it dramatically changed in Host 2 (compare virulence in both hosts for i ≤ 7, Fig. 3A,B).
We then compare the impact of the current policy (offering free high-level images to hosts) and of a proposed policy (offering free medium-level images to hosts) on the average property demand.
After all, according to one statistic bandied about by the hosts, Ed McMahon and Tim Conway, the average viewer sees 50,000 commercials in a single year.
In this case, where the original biometric signal is not hidden to a host-object, the average authentication rate was 72.07%.
But host populations are a mixture of host 'types' and because parasites do not chose their hosts and evolve to suit the average host (Mackinnon and Marsh 2010), the optimal level of virulence which evolves in a population will ultimately depend on the relative frequencies of non-immune versus semi-immune hosts in the population.
Finally, a measure of outbreak severity is based on information about the "passage time" or "serial interval" within a host; that is, the average time between the infection of an individual and the transmission to another individual.
