Effectiveness of immunotherapy

In the past, the effectiveness of immunotherapy and asthma was somewhat controversial. In the last few years, research suggests that immunotherapy is effective in certain populations. But, it's still not clear if the benefits are better than other options, such as inhaled corticosteroids. It's also not clear if patients who are treated with inhaled steroids have a different response to allergy shots than those who are not. It does seem that immunotherapy can prevent the development of asthma in children with severe allergies to airborne allergens.