I just bought a new server about three days ago however my server members and I have all gotten sick (even if we stay out of the rain, don't eat or drink anything bad). Getting sick is not really a big deal but we found that it's completely INCURABLE.
All of us are coughing, throwing up and no matter how many medications of all types we try, we change our clothes and disinfect everything and even stay far away from each other it won't go away. Even I have killed myself and respawned only to get the same incurable illness just minutes later though I came in contact with nothing that would ever get me sick.
I've been running servers for nearly a year and I've never had a bug like this before. I've gone through about 4 separate packs of each medication in two real-world days and it won't even ease up.