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Bacteria and viruses are often lumped together as germs, and they share many characteristics. They’re invisible to the human eye. They’re everywhere. And both can make us sick, even kill us. That last ...

Antibiotics are no longer able to treat infections as effectively as they once did because many pathogens have developed ...

Rather than a slow, gradual process as Darwin envisioned, biologists can now see how evolutionary changes unfold on much more accelerated timescales. Using an accelerated arms race between bacteria ...

If people had been aware of the existence of bacteria and their role in causing the Black Death in the 14th century, as well as the subsequent cholera pandemics, convincing them that bacteria could be ...

Where will the next pandemic come from? One expert says his "bet is on viruses." (Getty Images/Science Photo Libra) Nearly four years after COVID-19 emerged, public health experts already say it’s not ...