Childhood diseases are illnesses that commonly affect children, often due to their developing immune systems. These can include conditions like chickenpox, measles, and asthma. Many childhood diseases are contagious and can spread easily in schools and playgrounds, making it important for children to receive vaccinations to prevent outbreaks. Some childhood diseases can be mild, while others may lead to serious complications. Regular check-ups with a pediatrician can help monitor a child's health and catch any potential issues early. Parents should also be aware of symptoms and seek medical advice when necessary to ensure their child's well-being.