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A pollen count is a measurement of the number of pollen grains in a given volume of air. Pollen counts, and forecasts of pollen conditions, are routinely produced and reported to the public because high aerial pollen concentration is associated with increased rates of allergic reaction for those with conditions such as hay fever and asthma .
Indices were expected to then be 10.1 on Monday, 10.5 on Tuesday, 11.1 on Wednesday, 11.4 on Thursday and 11.3 on Friday, the last day for which a prediction was available, said pollen.com.
3.3 million (about 5.5% of the population [147]) Asthma: 10 million have allergic asthma (about 3% of the population). The prevalence of asthma increased 75% from 1980 to 1994. Asthma prevalence is 39% higher in African Americans than in Europeans. [148] 5.7 million (about 9.4%).
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Bet v 1 is the main cause of type I allergies observed in early spring. Type I, or immunoglobulin E-mediated (IgE-mediated) allergies affect 1 in 5 people in Europe and North America. Commonly observed symptoms are hay fever, dermatitis, asthma and, in severe cases, anaphylactic shock.
It also offers a 3-day pollen breakdown for tree pollen, grass pollen and ragweed pollen. For air quality data, a good option is AirNow, which tracks air quality data across the country.
Pollen grains of pines, firs, and spruces are winged. The smallest pollen grain, that of the forget-me-not (Myosotis spp.), [which?] is 2.5–5 μm (0.005 mm) in diameter. [5] Corn pollen grains are large, about 90–100 μm. [6] Most grass pollen is around 20–25 μm. [5] Some pollen grains are based on geodesic polyhedra like a soccer ball. [7]
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