What kind of virus do you have??
Don't get discouraged though, remember this saying " this too shall pass " Before you know it you'll be losing weight again. Actually you may want to enjoy it!!
It's a headache and stressful to be on a diet so maintaining is heaven for alot fo people. So be happy thst you have a doctors excuse for maintaining but before you know it you'll have his ok and be losing again and looking great!! What is your stats? Height, current weight and goal weight?