Getting sick is such a downer! Taking time off from work to lay in bed and get better means that you will have exponentially that much more work to do when you get better. So, to minimize your sickness, take some zinc ASAP!
The threshold amount to cut down colds was taking at least 13 milligrams every three to four hours during the day, for a total of 50-65 milligrams per day, so make sure you take enough for it to be effective!
Taken from: Lifehacker