Question: How is it possible for a person to come up with a medicines and vaccine to fight diseases

Justa Mwangi answered on 22 Jul 2025:

Developing medicines and vaccines to combat diseases is a complex process involving scientific research, rigorous testing, and regulatory approval. It typically begins with identifying a specific disease and understanding its underlying causes, often involving identifying the pathogen (like a virus or bacteria) or the faulty biological mechanism involved. Researchers then develop potential treatments or preventative measures, which are extensively tested in labs and on animals before progressing to human clinical trials. These trials assess safety and efficacy, and if successful, the treatment or vaccine can be approved for widespread use.