Okay, so a guard takes the temperature of everyone going through the checkpoint? If he measures the temp of someone who has Ebola, I am assuming he has come into contact with the virus. Gee, who wants that guard duty?
The thermometers are IR, so they (hopefully) aren’t coming in direct contact.
Even still, I do agree, who wants that guard duty?
If I were him, I’d have a whole bag of thermometers, and each time one registered a fever, I would dispose of it for incineration.