Yes. Dyson air purifiers are designed to remove airborne allergens that affect the immune system causing symptoms such as sneezing, coughing, irritation and even painful headaches. A major contributor to asthma is breathing polluted air and a Dyson air purifier can help with getting rid of the air of pollutant particles. Therefore, if you are asthmatic or allergic getting a Dyson air purifier will help you a lot.