Epidemiology

Peak prevalence is from late October to May. Over 90,000 children are hospitalized at an average cost of $70,000 per child, with 4500 deaths annually from RSV infection. The peak age of incidence in urban populations is 2 months and results in hospitalizations lasting 5 to 7 days. Disease in older children is usually milder. Bronchiolitis has also been shown to be a cause of severe pneumonitis in elderly populations.

This highly infectious virus is transmitted by direct contact with large droplets of secretions and self-inoculation by contaminated hands via the eyes and nose (no significant transmission occurs by small-particle aerosol). RSV-infected secretions remain infectious on countertops for more than 6 h. Strict attention to hand washing and use of masks and gloves can prevent transmission. RSV is shed from the respiratory tract of symptomatic and asymptomatic patients for up to 9 days. Immunocompromised patients may continue to shed for up to 6 weeks.

Essentials of Human Physiology

Essentials of Human Physiology

This ebook provides an introductory explanation of the workings of the human body, with an effort to draw connections between the body systems and explain their interdependencies. A framework for the book is homeostasis and how the body maintains balance within each system. This is intended as a first introduction to physiology for a college-level course.

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