Scientific Opinion on the substantiation of health claims related to various food(s)/food constituents(s) and “immune function/immune system” (ID 433, 605, 645, 791, 1384, 1451, 1624, 1743, 1776, 1838, 1851, 1854, 1891, 1895, 3074, 3191, 3211, 3218, 3336, 3341, 3450, 3514, 3658, 3756, 3802, 3805, 3841, 3935, 3979), “contribution to body defences against external agents” (ID 2344, 3208, 3213, 3270, 3278, 3285, 3294, 3309, 3387, 3424, 3428, 3536, 3537, 3539, 3575, 3577, 3579, 3582, 3603, 3618, 3755, 3776, 3777, 3778, 3801, 3804, 3840, 4367, 4472), reduction of inflammation (ID 1327, 1391) and decreasing potentially pathogenic gastro-intestinal microorganisms (ID 2362, 2730, 4064) pursuant to Article 13(1) of Regulation (EC) No 1924/2006