MATHEMATICAL AND COMPUTER MODELS OF THE COVID-19 EPIDEMIC

MATHEMATICAL AND COMPUTER MODELS OF THE COVID-19 EPIDEMIC

The COVID-19 epidemic has gone down in history as an emergency of international importance.Currently, the number of people infected with coronavirus around the world continues to grow, and modeling such a complex system as the spread of infection is one of the most pressing problems.Various models are used to understand the progress of the COVID-19

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Acquired childhood bladder melanosis

Abstract Background Bladder melanosis is rare.It has previously been described only in the fifth decade of life or beyond; it has not been described in childhood.Previous descriptions have generally been case reports, and so the natural history is poorly understood.Urinary symptoms present at the time of cystoscopy have frequently been Boys Bags at

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