Many pathogens spread by being silently carried in this way by some of their host population.

The presence of the parasite does not seem to hurt the host population.

But at a certain point the parasites run out of hosts on which to feed, die off and allow the host population to recover.

However, scientists don't really know how these microbes become entrenched in new host populations.

All the parasites of one species in a host population.

As one can see he already talked, back in the 80s about benefits for the host population and used the term human tourism.

These draw upon the resources of the host population and rapidly kill many victims.

The lack of genetic variability created a susceptible host population for the organism.

Therefore, only the host population is tracked in host-pathogen models.

Korean workers were also not afforded the opportunity for much social contact with their host population, though a few did convert to Islam.