Individuals who were asymptomatic had significantly lower seroprevalence ( 0 . 6 % [ 90 % CI 0 . 0 - 1 . 5 ] ) compared with the overall state estimate , while those who reported having had ≥1 and ≥2 symptoms had a seroprevalence of 8 . 0 % ( 90 % CI 3 . 1 - 12 . 9 ) and 13 . 0 % ( 90 % CI