I just want it has just random abilities that it decides to switch on and off depending on who it infects.

I didn’t get any rashes or anything but on top of the standard flu-like symptoms I couldn’t really remember things with any degree of reliability. And I found it very hard to think logically, I remember staring at my phone and I really could not work out for the life of me how to use it. I knew I should know how to use it but in the moment I couldn’t work it out and I had to give up.