While a few are killers, viruses are actually important to human health and incredibly useful in medicine.
While some viruses make us sick, others can fight against bacteria, or protect us from more harmful viruses.
Many articles describe the rise of superbugs - bacteria that are resistant to antibiotic drugs - as inevitable. But society has the knowledge to stop the spread of these microbes.
Cholera kills fast, and outbreaks are common in war-torn regions and after natural disasters where clean water is scarce. A new strategy to prevent cholera infections is a 'cocktail' of live virus.
Bacteria are becoming resistant to even the most powerful antibiotics. These expensive, hard-to-treat infections are prompting physicians to reassess using viruses to destroy bacteria.
Just because you don't have the flu doesn't mean that your aren't teeming with viruses inside and out. But what are all these viruses doing, if they aren't making you sick?
The 2018 Nobel Prize in Chemistry goes to work on how to use the principles of evolution to create new medical treatments and renewable fuels.