Inventions: Vaccines • English Conversation Questions

What is a vaccine and how does it work?
What was the first vaccine developed and for which disease?
How have vaccines impacted public health?
What are some common side effects of vaccines?
What are some ethical considerations surrounding the development and distribution of vaccines?
What role do vaccines play in disease prevention and control?
How are vaccines tested for safety and efficacy before being approved for use?
What are some examples of vaccines that are currently available?
Are there any diseases for which a vaccine does not yet exist?
What are some ongoing efforts to develop vaccines for these diseases?
What are some challenges that scientists and researchers face when developing vaccines?