The following section looks at each of these routes into the public domain more closely. Copyright has expired for all works published in the United States before 1923. In other words, if the work was published in the U.S. before January 1, 1923, you are free to use it in the U.S. without permission.
Allergies. An allergy is a broad category describing any time your immune system reacts differently than a normal personâs immune system would react when exposed to something. Symptoms can range from undetectable to extreme and constant, depending on the specifics of the allergy. Weather can play a huge role in allergies and their symptoms during all four seasons of the year. Some people are triggered by rain, others by dry weather. Heat triggers some and cold triggers others. Each of the four season changes can bring new changes in allergy symptoms:
Different people react differently to the same allergens. Some people may just have an uncomfortable rash, while others may go into anaphylactic shock. In any case, signs and symptoms of a food allergy usually develop within a few minutes to an hour after having ingested the food. The most common signs and symptoms of a true food allergy include: 1  tingling in the mouth; 2  itching or eczema; 3  swelling, especially on the lips, face, throat, and neck; 4  wheezing, nasal congestion, and a general difficulty in breathing; 5  abdominal pain, nausea, and vomiting. 6  dizziness, light-headedness, and fainting.