A monster cold is the result of your immune system not being optimal. I used to suffer a TERRIBLE chest cold every winter that lasted for 8 weeks or more, and caught the flu whenever it was going around. I discovered the solution is Vitamin D3 Geltabs. Now I have not suffered in 8 years !
The solution is 10,000 IU Vitamin D3 GELTABS. Get your D3 blood level up to 70 to 80 ng/ml - Each 1,000 IU change in D3 will adjust your blood level by 10ng/ml.