MS-DOS resulted from a request in 1981 by IBM for an operating system to use in its IBM PC range of personal computers. Microsoft quickly bought the rights to 86-DOS from Seattle Computer Products, and began work on modifying it to meet IBM's specification.
Complications from whooping cough can include weight loss, loss of bladder control, fainting, rib fractures from severe coughing, and pneumonia. A small percentage of adolescents and adults with whooping cough need to be hospitalized for their illness. In one study, 61% of adults with whooping cough missed work.
The coughing often occurs in paroxysms during Pertussis, also known as whooping cough, is an acute respiratory tract infection that has increased in incidence in recent years. The initial catarrhal stage presents with nonspecific symptoms of malaise, rhinorrhea, sneezing, lacrima-tion, and mild cough.linical Presentation The incubation period of pertussis is seven to 10 days, longer than the typical one-to three-day period for most viral upper respi-ratory tract infections. Patients then develop a presentation that can vary from asymp-tomatic to a mild respiratory tract infection to a persistent, severe cough.