Garlic is found to be effective against a number of viral infections including the common and the rarest ones! Garlic is best used in oil form to treat infections. To make garlic oil at home, crush garlic using mortar pestle and add them to carrier oil (like olive oil). Let the mixture sit for about five hours, and then strain the bits of garlic and keep the oil in a jar with a lid. You can also swallow a raw clove of garlic; you might need to cut it in half if it’s too large. Bite down once to release the allicin; then swallow with water like a pill.