Similar, to influenza, mice infected with RSV which were exposed to non-viral antigens (ragweed and OVA) with or without alum adjuvant from day 4 to day 8 p.i. were found to produce greater levels of allergen-specific antibodies in serum (IgE and IgG) and bronchoalveolar lavage (BAL) fluid (IgA and IgG) than mice that were not infected with the virus [74, 75]. Here, IGHE is linked to influenza.