I'm sick; I've been infected with the flu; I must have received a very ill condition, the flu, in which I need to stay home until I feel much better for the foreseeable future; I, a male human being, had just been affected regarding with a common disease-casing organism, otherwise known as the flu. So in order for I to recover from this major disease, I must isolate for precisely a few days, enough so I am 100% healthy to resume my work