Helicobacter pylori infection affects more than half of the world’s population. The infection is generally acquired during childhood but can remain asymptomatic, with long-term clinical sequelae including gastritis, peptic ulcer disease, and stomach cancer.
Digital pregnancy tests have become more common in recent years. These may look different from the outside, but they work exactly the same way. Use sensors to detect colour changes and decide whether to display ‘pregnant' or ‘not pregnant' on the screen.