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Our  body converts vitamin D to a chemical known as 25-hydroxyvitamin D, also called Calcidiol. Declining serum concentrations of 25-hydroxyvitamin D seen in fall and winter as distance increases from the equator may be a factor in the seasonal increased prevalence of influenza and other...

Acute respiratory infection (ARI) is widespread not only in the paediatric age group but also in adults. Respiratory tract infections are the major cause of mortality and morbidity. There are limited options available for treatment and prevention of ARI. Antibiotics are the mainstay of treatment...