Question was about using a USB Flash drive on a Business Center computer. Anytime you use a public computer in a Business Center, Hotel, Library or even a family member or friends house, you run the risk of picking up a malware infection. You just never know...
So you can write protect your USB Flash Drive so that malware cannot infect it and you don't end up carrying the infection to your home computer.
Malware: Its the Gift that keeps on giving!
Check out this article on write protecting your USB Flash drive:
I'd recommend the easy solution which is enabling the slide switch. Using the Diskpart command can be an advanced solution if you're not familiar with disk partitions.