Tree damage is already at high levels in the Southeast and Texas . If people drive less to save gas money , that would lower the level of pollution , which exacerbates allergies , he said . Expert : Less pollution means some relief for allergies in urban areas . US : About 17.6 million Americans have contracted yellow fever . Allergy shots are an option for those with severe health or work concerns .
Tree damage is already at high levels in the Southeast and Texas . Expert : Less pollution means some relief for allergies in urban areas . US : About 17.6 million Americans have contracted yellow fever . Allergy shots are an option for those with severe health or work concerns .