The net profit margin ratio is a profitability ratio. Essentially, it's the percentage of profit from business operations after you've deducted business operating expenses, interest expense, taxes and preferred stock dividends from revenues. Common stock dividends are the only major debit item left out of the equation.
Severe Allergic Reaction Facts. Anaphylaxis is a severe allergic reaction that occurs rapidly and causes a life-threatening response involving the whole body. This reaction can lead to difficulty breathing and shock ultimately leading to death. For an anaphylactic reaction to occur, you must have been exposed in the past to the substance that causes the reaction, called the antigen. A bee sting, for example, may not cause an allergic reaction the first time.
Anaphylaxis is the result of your body's immune system overreacting to a harmless substance, such as food. Substances that trigger allergic reactions are known as allergens. Anaphylaxis usually develops within minutes of contact with an allergen, but sometimes the reaction can happen up to four hours later.naphylaxis is a severe, potentially life-threatening allergic reaction that can develop rapidly. It is also known as anaphylactic shock. Signs of anaphylaxis include: 1  itchy skin or a raised, red skin rash.