Reports of influenza epidemics and gastrointestinal viruses are reported every couple of weeks on the news. In most cases, it’s a matter of insufficient hygiene and the spread of germs.
The problem is that we can not see these microscopic threats with the naked eye, but a smartphone can shine some light on the truth; literally!
Before you go to the bathroom, do the backlight test first!
Then, turn the light off, and you’l be surprised at what you will see.