We are surrounded by a huge number of different bacteria, viruses and fungi. Many of these microscopic organisms, also known as microorganisms or microbes, have a bad reputation for destroying our health. But some of them may be crucial for the human body. Do you know that the human gut contains around one thousand different species of bacteria? And they are truly good for us. These 'good bacteria' help us digest food and keep our gut healthy. However, there are a lot of microorganisms that...