The flu is an infectious disease, caused by a virus. It presents with fever, muscle and joint pain, nasal congestion, and headache.The flu has a high contagiousness, coupled with the virus’ ability to mutate from one season to the next. In the most frail groups, such as the elderly and patients with chronic conditions, such as COPD, heart disease, and diabetes, influenza can have serious complications.

Methods of poisoning: blockers (propranolol, atenolol, oxprenolol)
An overdose of such drugs in children may occur accidentally, while in adults it may be voluntary or from therapeutic overdose. By their blocking action on nerve endings, these drugs