Mine hit me hard! Couple of days with a terrible headache, then the body aches hit, and the congestion, and completely lost my appetite. I was basically in bed for 5 days and home from work for 10! I was in so much pain, I couldn’t sleep, just aches all over! After it passed, I had major brain fog for about a week. I could barely sit through a conference call at work, I really needed everyone to speak slowly to me lol. It was brutal.