Are there any suggestions?
I'll give a hint: it's something you use every day.
These pictures show the hidden life that boils on your phone. These pictures were taken by students from the University bacteriologist Surreya.K Fortunately, most of these bacteria are harmless, however, it just shows the invisible life that may be hiding on your phone.
Although some of them may meet some disease vectors, such as Staphylococcus aureus, which causes staph infections, including food poisoning, impetigo and even sepsis.