This article is part one in a series of explainers on vaccine development and distribution. This article focuses on how vaccines work to protect our bodies from disease-carrying germs.
Part two focused on the ingredients in a vaccine and the three clinical trial phases. Part three outlines the next part of the vaccine journey: the steps from completing the clinical trial phases through to distribution.Germs are all around us, both in our environment and in our bodies.
When a person is susceptible and they encounter a harmful organism, it can lead to disease and death.The body has many ways of defending itself against pathogens (disease-causing organisms).