“…In a Swedish seroprevalence survey conducted among approximately 1600 individuals in each age group during April-May, 2020, 3.1% of those 65 and older had developed antibodies, compared to 6.5% among those 20-64 and 5.7% among those age 0-19 ( 19 ). In contrast, in a the Spanish National Seroprevalence Survey of 61,000 participants , those over 65 were most likely to have antibodies with 6.0% (>65), compared to 5.3% ( 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 , 37 , 38 , 39 , 40 , 41 , 42 , 43 , 44 , 45 , 46 , 47 , 48 , 49 , 50 , 51 , 52 , 53. ( , 54 , 55 , 56 , 57 , 58 , 59 , 60 , 61 , 62 , 63 , 64 ), and 3.4% (0-19)( 20 ) .…”