I am not really the best one to gauge it on because it has set other conditions into relapse so i'm not sure,i can say i got it the weekend of the cup final,started with the worst of it 3-4 days later,it is what 3 weeks on now and i am still coughing and exhausted,i think in most people the worst of it will be about 7 days,if you are well you should be over it by then,they did say the cough would go on a while,we really need someone who s usually well to share how long it took them to get over it,remember this will be unpleasent but for MOST it will not be too bad