squirrel disease

The other night I heard rustling in my room around 3 in the morning. I was all set to yell at my roomates when I looked up and discovered that it was a squirrel! When he (and I use 'he' loosely) heard me get up he ran out the window. For some reason I didn't think to actually close my window...I just went back to sleep, only to be awoken by rustling sounds once again. This time the squirrel was all the way in my room. I talked to him for a bit, which made him more comfortable. Then I realized that a sketchy squirrel being comfortable in my room might not be a good thing, so I asked him if he could please leave. He did, and I decided to close my window for the first time since moving in. Then I thought about how he has probably been coming in and out my window for the past 5 months without my noticing. My boss informed me of all the diseases squirrels carry. Now I feel really sick. Does anyone know the symotoms of squirrel disease?

I'm also missing one of my wednesday socks. I think the squirrel has it.