Getting old is an inescapable fact of life, like wet British summers. But age may not be entirely due to processes in our body cells. Instead, our bodies may age in part because of the actions of microorganisms like bacteria, which interfere with our biology.
Original article: https://www.newscientist.com/article/2281917-harmful-viruses-and-even-friendly-bacteria-may-cause-premature-ageing/
