Thus, fever would make it more difficult for an infecting bacterium to acquire iron and thus to multiply.
因此，发烧会使感染细菌更难获得铁，从而更难繁殖。
2
Colds mutate even while they're infecting you, and new strains pop up so often that by the time drug-makers create a vaccine against one variation, the serum is already out of date.