This study investigated the result of attending pre-school on mucosal immunity. atopic (< .05). Higher IgG levels were associated with exposure to ETS (< .001), while lower levels were associated to having atopy. Higher IgM levels were associated with previous childcare experience (< .01) whilst having been hospitalised was associated with having low salivary IgM… Continue reading This study investigated the result of attending pre-school on mucosal immunity.