Scientists from Imperial College London found people with hay fever, an allergic reaction to pollen, were able to “suppress” the condition by taking pollen pills or undergoing injections. However, while a three-year course of treatment was shown to markedly lessen symptoms “for several years”, two years of treatment did not bring the same benefits.
Past studies have shown that exposing patients to increasing amounts of grass pollen over time – a type of immunotherapy – is an effective way to reduce severe symptoms in the long term. Hay fever has been estimated to affect as many as one in four people across the UK. The majority of these cases are initiated as a reaction to grass pollen.