the boy is allergic to ragweed. in a medical mask, he holds a ra

acacia allergen allergenic allergic allergy ambrosia artemisiifolia background blooming blossom botany boy carrot clear closeup color disease fever field flora flower green growth habitat harmful hay illness inflorescence leaf light nature one overgrown pest plant pollen pollination quarantine ragweed reaction season sickness sky snuffle spider stem summer tassel weed wormwood