Some experts believe it's possible.
Asthma is a condition in which the immune system reacts to imagined invaders such as dust and pollen by causing the lung passages to narrow, making breathing difficult. But right now, the connection is just a hypothesis, and most experts don't believe it's very likely to prove true. We do know that asthma is 26 percent more common in black children than in white children, and that between 1982 and 1994 the asthma rate in males increased by 42 percent while in females it increased 81 percent. The few studies done so far on the topic have yielded conflicting results. A larger trial is currently underway in New Zealand.