Instructors Guide to Anti-Virus
From Ledet Training Wiki
It's important for professional trainers to run modern anti-virus software on your laptop. The virus definitions should be updated daily. Any USB disks or other storage media used with client machines should be scanned.
Microsoft Security Essentials is a good choice for Windows machines. It's what we use at Ledet training. ClamXAV is a good choice for Mac, Windows and Linux. Both products are free.
If a contractor introduces a virus to a client's computer, the contract trainer is responsible for expenses incurred in eradicating the virus from the Client's network.