mother and son in a medical mask because of an allergy to ragweed

allergen allergenic allergic allergy ambroise ambrosia artemisiifolia background blooming blossom blowing botany color disease endemic fever flora flower flu grass green growth habitat hay illness influenza leaf meadow natural nature nose overgrown plant pollen quarantine ragweed reaction season sensitive sickness sneeze spider stem stickweed summer tassel weed women wormwood young