Infirmary: A place of care for the sick and injured, typically a small hospital or dispensary in an institution.

Isopropyl Alcohol: It is a colorless, flammable chemical compound with a strong odor. It is the simplest example of a secondary alcohol, where the alcohol carbon atom is attached to two other carbon atoms sometimes shown as (CH3)2CHOH. It is used as a disinfectant for medical uses.

European Center for Disease Prevention and Control:The European Centre for Disease Prevention and Control (ECDC) is an independent agency of the European Union (EU) whose mission is to strengthen Europe’s defenses against infectious diseases. It was established in 2005 and is located in Solna, Sweden.

Paroxysmal Positional Vertigo: Benign paroxysmal positional vertigo (BPPV) is a disorder arising in the inner ear. Its symptoms are repeated episodes of positional vertigo, that is, of a spinning sensation caused by changes in the position of the head. BPPV is the most common cause of the symptoms of vertigo. Vertigo, a distinct process sometimes confused with dizziness, accounts for about 6 million clinic visits in the U.S. every year, and 17–42% of these patients eventually are diagnosed with BPPV.