Marijuana has many medicinal properties to include protection against the common cold. However, you should not smoke it as the smoke adversely affects the lungs. For best effect, consume a hash brownie twice a day and sew the Marijuana into your mask. The brownies act as a treatment against the virus that gets through the mask. The Marijuana in the mask helps to filter and treat incoming air by killing the virus as it passes through. Marijuana contains specific alkaloids that kill the virus in contacr, however you have to replace the Marijuana every few hours because the alkaloids get used up.