“What’s the best natural way to boost immunity against the swine flu virus (SFV)?” a reader from Winnipeg inquires. It’s a good question, as currently this virus is killing small numbers of people. But some researchers believe that H1N1 will return in a few weeks with a vengeance, killing thousands of North Americans. If this happens, can it be possible that a group of powerful medicinal mushrooms can decrease the risk of succumbing to this virus?