How has technology reduce the spread of infectious disease?

According to naeyc, are the youngest age group that may be out of the hearing range of supervising teachers for short periods of time. preschoolers infants kindergarteners toddlers

Explain why many people are concerned about uv rays? explain what causes the skin to burn in the sun? explain why people should avoid the sun if taking a photosensitive medication?

What are modern-day treatments for schizophrenia? how is treatment better today than 50-60 years ago? what are some of the obstacles that a person with schizophrenia faces? are there any natural treatments?