There is a disturbing trend among visitors to medical facilities charging up their mobile devices. The ports on those devices are usually not simple charging stations. Innocently plugging your phone into one of those ports could damage the medical device, rendering it inoperable. A phone that is already infected with malware could potentially transmit the digital infection, causing the device to behave in unpredictable ways long after the phone is unplugged. There are many compact devices that you can carry that will allow you to charge up when your battery is running low.”]
Source: https://grahamcluley.com/care-charge-phone-youre-hospital/